Author: claimsbot

What is claimed:

1. A method for customizing a television channel list comprising the steps of:
receiving a first channel indicator corresponding to a first channel and a second channel indicator corresponding to a second channel, the first and second channels defining a range of television channels; and
selectively updating a customized channel list with respect to inclusion of the range of television channels responsive to the received first and second channel indicators.
2. The method of claim 1, further comprising the step of:
receiving an operation indicator representing actions related to inclusion of the range of television channels in the customized channel list;
wherein the step of selectively updating the customized channel list is further responsive the operation indicator.
3. The method of claim 2, wherein the operation indicator is an add indicator or a delete indicator and wherein the selectively updating step comprises at least the steps of:
adding the range of television channels to the customized channel list if the operation indicator is the add indicator; and
removing the range of television channels from the customized channel list if the operation indicator is the delete indicator.
4. The method of claim 2, wherein the operation indicator is selected by a user.
5. The method of claim 2, wherein the operation indicator is automatically selected responsive to a user action.
6. The method of claim 1, further comprising the steps of:
soliciting the first and second channels from a user; and
generating the first and second channel indicators responsive to the solicited first and second channels, respectively.
7. The method of claim 6, wherein the soliciting step comprises at least the steps of:
displaying a graphical user interface having a channel range selection area for receiving the first and second channels from a user, wherein the first and second channel indicators are generated responsive to the first and second channels received from the user.
8. The method of claim 6, wherein the soliciting step comprises at least the steps of:
displaying a graphical user interface depicting a plurality of available television channels; and
enabling the selection of the first channel and the second channel from the plurality of depicted available television channels graphically through a user interface, wherein the first and second channel indicators are generated responsive of the first and second channels selected by the user.
9. A system for customizing a television channel list comprising:
means for receiving a first channel indicator corresponding to a first channel and a second channel indicator corresponding to a second channel, the first and second channels defining a range of television channels; and
means for selectively updating a customized channel list with respect to inclusion of the range of television channels responsive to the received first and second channel indicators.
10. The system of claim 9, further comprising:
means for receiving an operation indicator representing actions related to inclusion of the range of television channels in the customized channel list;
wherein the means for selectively updating the customized channel list is further responsive the operation indicator.
11. The system of claim 10, wherein the operation indicator is an add indicator or a delete indicator and wherein the selectively updating means comprises at least:
means for adding the range of television channels to the customized channel list if the operation indicator is the add indicator; and
means for removing the range of television channels from the customized channel list if the operation indicator is the delete indicator.
12. The system of claim 9 further comprising
means for soliciting the first and second channels from a user; and
means for generating the first and second channel indicators responsive to the solicited first and second channels, respectively
13. A television system having a customized channel selection list comprising:
a processor that generates a graphical user interface to solicit a first and second channel from a user, the first and second channels defining a range of television channels; receives a first channel indicator corresponding to the first channel and a second channel indicator corresponding to the second channel; and selectively updates a customized channel list with respect to inclusion of the range of television channels responsive to the received first and second channel indicators; and
a display device that displays the graphical user interface generated by the processor.
14. The system of claim 13, wherein the processor further receives an operation indicator representing actions related to inclusion of the range of television channels in the customized channel list, wherein the processor selectively updates the customized channel list further responsive to the operation indicator.
15. A television apparatus for customizing a channel selection list for use with a television, the apparatus comprising:
a processor that generates a graphical user interface to solicit a first and second channel from a user, the first and second channels defining a range of television channels; receives a first channel indicator corresponding to the first channel and a second channel indicator corresponding to the second channel; and selectively updates a customized channel list with respect to inclusion of the range of television channels responsive to the received first and second channel indicators; and
a display circuit that produces the graphical user interface for display on the television.
16. The apparatus of claim 15, wherein the processor further receives an operation indicator representing actions related to inclusion of the range of television channels in the customized channel list, wherein the processor selectively updates the customized channel list further responsive to the operation indicator.
17. A computer readable medium including software that is configured to control a general purpose computer to implement a method for customizing a television channel list, the method comprising the steps of:
receiving a first channel indicator corresponding to a first channel and a second channel indicator corresponding to a second channel, the first and second channels defining a range of television channels; and
selectively updating a customized channel list with respect to inclusion of the range of television channels responsive to the received first and second channel indicators.
18. The computer readable medium of claim 17, wherein the method implemented in software to control the general purpose computer further comprises the step of:
receiving an operation indicator representing actions related to inclusion of the range of television channels in the customized channel list;
wherein the selectively updating step of the method implemented in software to control the general purpose computer is further responsive the operation indicator.
19. The computer readable medium of claim 18, wherein the operation indicator is an add indicator or a delete indicator and the selectively updating step of the method implemented in software to control the general purpose computer comprises at least the steps of:
adding the range of television channels to the customized channel list if the operation indicator is the add indicator; and
removing the range of television channels from the customized channel list if the operation indicator is the delete indicator.
20. The computer readable medium of claim 17, wherein the method implemented in software to control the general purpose computer further comprises the steps of:
soliciting the first and second channels from a user; and
generating the first and second channel indicators responsive to the solicited first and second channels, respectively.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

What I claim is:

1. A cleaning device comprising a body made of porous polyvinyl acetal material having a uniform pore size throughout the material with over 90% of the pores ranging from about 7 microns to about 40 microns in diameter.
2. A cleaning device as claimed in claim 1 wherein said device is a roller having a smooth outer surface.
3. A cleaning device as claimed in claim 1 wherein said device is a pad.
4. A cleaning device as claimed in claim 1 wherein said device is a disk.
5. A cleaning device as claimed in claim 1 wherein said polyvinyl acetal material has an average pore size of about 20 microns.
6. A cleaning device as claimed in claim 1 wherein said material has about 95% of its pores with a diameter below 40 microns.
7. A cleaning device comprising a body made of porous polyvinyl acetal material having a bubble point pressure of about 0.92 PSI.
8. A cleaning device as claimed in claim 2 wherein said roller has an outside diameter of about 60 mm and an inside diameter of about 30 mm with a thickness of about 15 mm.
9. A cleaning device as claimed in claim 1 wherein said material has a mean flow pore pressure of about 0.33 PSI.
10 A semiconductor cleaning device comprising a body made of porous polyvinyl acetal material with a cylindrical roller shape and a smooth outer surface, said material having a uniform pore size throughout with at least 90% of the pores ranging from about 7 microns to about 40 microns in diameter with a fluid flow through rate which does not distort the roller during the cleaning process.
11. A semiconductor cleaning device as claimed in claim 10 wherein said polyvinyl acetal material has an average pore size of about 20 microns.
12. A semiconductor cleaning device as claimed in claim 10 wherein said material has 95% of its pores with a diameter below 40 microns.
13. A semiconductor cleaning device comprising a body made of porous polyvinyl acetal material having at least 95% of its pores with a diameter under 40 microns.
14. A semiconductor cleaning device as claimed in claim 10 wherein said roller is substantially skinless.
15. A semiconductor cleaning device as claimed in claim 10 wherein said material has a mean flow pore pressure of about 0.33 PSI.
16. A semiconductor cleaning device comprising a body made of porous polyvinyl acetal material having a uniform pore size throughout the material with at least 95% of the pores being less than 40 microns in diameter, said material having a mean flow pore diameter of about 20 microns.
17. A semiconductor cleaning device as claimed in claim 16 wherein said material has a mean flow pressure of about 0.33PSI.
18. A semiconductor cleaning device comprising a substantially cylindrical roller body made of polyvinyl acetal with a smooth outer surface and uniform material porosity having a mean flow pore pressure ranging from about 0.30 PSI to about 0.40 PSI with 90% of its pores ranging from 7 to 40 microns and wet flow rate using water as a medium ranging from about 9.0 Lmin to 20.0 Lmin.
19. A semiconductor cleaning device as claimed in claim 18 wherein cleaning solvent flow through said roller ranges from 120-180 mlminute.

1. A circuit for protecting a device under test (DUT), wherein the circuit and the DUT are connected in parallel to a power supply supplying current to the DUT, and wherein the DUT is switchable between conducting and non-conducting states, wherein and the circuit is switchable between conducting and non-conducing, states, and
wherein the circuit is switched from the non-conducting state to the conducting state before the DUT is switched from the conducting state to the non-conducting state, so that the current supplied from the power supply to the DUT flows through the circuit when the DUT is switched from the conducting state to the non-conducting state.
2. The circuit of claim 1, wherein the circuit is switched from the non-conducting state to the conducting state after the DUT is in a required test state.
3. The circuit of claim 1, wherein the circuit and the DUT have insulated gate bipolar transistors (IGBTs) where time required for electrically connecting a collector and an emitter of each of the IGBTs upon switching on is shorter than time required for electrically disconnecting the collector and the emitter upon switching off.
4. The circuit of claim 1, wherein current capacity of the circuit is set to be greater than that of the DUT, and internal resistance of the circuit is set to be smaller than that of the DUT.
5. A method for protecting a device under test (DUT) which is supplied with current from a power supply, and wherein the DUT is switchable between conducting and non-conducting states, the method comprising the steps of:
connecting a circuit for protecting the DUT to the power supply, the circuit and the DUT being connected in paralled to the power supply, and wherein the circuit is switchable between conducting and non-conducting states; and
switching the circuit from the non-conducting state to the conducting state before the DUT is switched from the conducting state to the non-conducting state, so that the current supplied from the power supply to the DUT flows through the circuit when the DUT is switched from the conducting state to the non-conducting state.
6. The method of claim 5, wherein in the step of switching the circuit to the conducting state, the circuit is switched from the non-conducting state to the conducting state after the DUT exhibits a required test state.
7. The method of claim 5, wherein the circuit and the DUT have insulated gate bipolar transistors (IGBTs) where time required for electrically connecting a collector and an emitter of each of the IGBTs upon switching on is shorter than time required for electrically disconnecting the collector and the emitter upon switching off, and
wherein in the step of switching the circuit to conducting state, a turn-on signal and a turn-off signal are simultaneously supplied to the circuit and the DUT, respectively.
8. The method of claim 5, wherein current capacity of the circuit is set to be greater than that of the DUT, and internal resistance of the circuit is set to be smaller than that of the DUT.
9. A testing apparatus comprising:
a power supply; and
a circuit for protecting a device under test (DUT), the circuit and the DUT being connected in parallel to the power supply and wherein the circuit and the DUT are each switchable between conducting and non-conducting states, and further wherein the power supply supplies current to the DUT, and
wherein the circuit is switched from the non-conducting state to the conducting state before the DUT is switched from the conducting state to the non-conducting state, so that the current supplied from the power supply to the DUT flows through the circuit when the DUT is switched from the conducting state to the non-conducting state.
10. The testing apparatus of claim 9, wherein current capacity of the circuit is set to be greater than that of the DUT, and internal resistance of the circuit is set to be smaller than that of the DUT.
11. A testing method for use in a testing apparatus which includes a power supply for supplying current to a device under test (DUT) which is switchable between conducting and non-conducting states, the method comprising the steps of:
connecting a circuit for protecting the DUT to the power supply, the circuit and the DUT being connected in parallel to the power supply, and wherein the circuit being switchable between conducting and non-conducting states;
performing a dynamic characteristic test, wherein the current is supplied to the DUT by switching the DUT to the conducting state; and
switching the circuit from the non-conducting state to the conducting state before the DUT is switched from the conducting state to the non-conducting state, so that the current supplied from the power supply to the DUT flows through the circuit when the DUT is switched from the conducting state to the non-conducting state.
12. The testing method of claim 11, further comprising a step of performing a static characteristic test of the DUT.
13. The testing method of claim 12, further comprising:
performing a first static characteristic test of the DUT before performing the dynamic characteristic test; and
performing a second static characteristic test of the DUT after performing the dynamic characteristic test.
14. The testing method of claim 11, wherein current capacity of the circuit is set to be greater than that of the DUT, and internal resistance of the circuit is set to be smaller than that of the DUT.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A semi-trailer for contained transport of crushed vehicles, comprising:
a platform supported by a wheeled undercarriage for transport on public roads, said platform having first and second sides from which substantially vertical walls are extended thereby bounding an open top of sufficient width and length to receive crushed vehicles therein;
a first sidewall extended along said platform first side;
front and rear end walls extended vertical from said platform, each end wall adjoins said first sidewall at respective front and rear corner junctions;
a second sidewall pivotably disposed in a closed position adjacent said second side and opposed from said first sidewall, said second sidewall including front and rear upper support segments extended laterally from opposed upper corners of said second sidewall, said front and rear support segments having respective front and rear connecting ends aligned above and pivotably mounted to respective front and rear end walls proximal of said first sidewall; and
a hydraulic cylinder pivotably connected to said platform and having a hydraulic piston slidably extended therefrom for pivotable connection to a mid-portion of one of said front and rear upper support segments, said piston is hydraulically extendable for clamshell movement of said front and rear support segments and said second sidewall to a raised position above said platform;
whereby unobstructed side access to said platform for loading and unloading of vehicles is provided with said second sidewall in said raised position, and said second sidewall is pivotable to said closed position for contained transport of vehicles over public roads.
2. The semi-trailer of claim 1 wherein said second sidewall further including:
an upper support frame extended lengthwise between an upper front corner and an upper rear corner of said second sidewall;
a lower frame of sufficient vertical width to extend from said upper support frame to a base edge of sufficient horizontal length to sealingly engage against said platform second side when said second sidewall is in said closed position;
said front upper support segment extended perpendicular from said upper front corner of said second sidewall for traversal of said platform above said front end wall;
said rear upper support segment extended perpendicular from said upper rear corner of said second sidewall for traversal of said platform above said rear end wall; and
said open top bounded by said front upper support segment, said upper support frame of said second sidewall, said rear upper support segment, and said first sidewall when said second sidewall is in said closed position;
whereby said platform provides loading and unloading of crushed vehicles from overhead through said open top above said platform when said second sidewall is in said closed position.
3. The semi-trailer of claim 2 wherein said hydraulic cylinder and piston further includes:
a front hydraulic cylinder having a front piston reciprocatingly extendable therefrom, said front hydraulic cylinder is pivotably connected to said platform exterior of a mid-portion of said front end wall, said front piston having a distal end extendable to connect to a mid-portion of said front upper support segment;
a rear hydraulic cylinder having a rear piston reciprocatingly extendable therefrom, said rear hydraulic cylinder is pivotably connected to said platform exterior of a mid-portion of said rear end wall, said rear piston having a distal end extendable to connect to a mid-portion of said rear upper support segment;
a hydraulic power system and motor disposed on said platform, said hydraulic power system having a plurality of hydraulic hoses detachably extended to respective front and rear hydraulic cylinders, said hydraulic power system and motor provides sufficient hydraulic pressure transmitted through said plurality of hydraulic hoses for synchronous hydraulic actuation and extension of respective front and rear pistons for synchronous movement of said front and rear upper support segments and said second sidewall; and
a control mechanism in communication with said hydraulic power system and motor, said control mechanism is activated by an operator for controlled synchronous movement of said front and rear upper support segments and said second sidewall relative to said platform.
4. The semi-trailer of claim 3 wherein said second sidewall further including:
said front upper support segment including a substantially triangular width in cross-section and having a reinforced central gusset member and a first lower support edge disposed in alignment above said front end wall when said second sidewall is moved to said closed position; and
said rear upper support segment including a substantially triangular width in cross-section and having a reinforced central gusset member and a second lower support edge disposed in alignment above said rear end wall when said second sidewall is moved to said closed position.
5. The semi-trailer of claim 4 wherein said front and rear connecting ends of said second sidewall further include:
said front connecting end is releasably connected by at least one pivot pin to a front pivot junction on an upper portion of said front end wall proximal of said front corner junction with said first sidewall; and
said rear connecting end is releasably connected by at least one pivot pin to a rear pivot junction on an upper portion of said rear end wall proximal of said rear corner junction with said first sidewall.
6. The semi-trailer of claim 5 wherein said platform supported by said wheeled undercarriage further including a front support retractably disposed under said platform front end wall, said front support is extendable to rest on a supporting surface for maintenance of said platform in a level configuration during loading and unloading, said front support is retractable under said platform front end wall during towed transport of said platform and wheeled undercarriage when coupled with a tractor-trailer vehicle for transport over public roads.
7. A semi-trailer for transport of salvageable materials, comprising:
a platform supported by a multi-wheeled undercarriage for transport on public roads, said platform having a fixed first sidewall extended vertically between along a first side of said platform, and front and rear end walls extending substantially perpendicular from respective front and rear corners of said first sidewall, said platform having an open top bounded by said sidewall and end walls, said open top having a sufficient width and length for positioning salvageable materials therein;
a second sidewall pivotably mounted to extend vertically above a second side of said platform, said second sidewall mounted for clamshell movement between a closed position substantially parallel with said fixed sidewall, to a raised position disposed above said platform, said second sidewall including:
front upper support segment aligned parallel above said front end wall when said second sidewall is in said closed position;
rear upper support segment aligned parallel above said rear end wall when said second sidewall is in said closed position; and
said front and rear upper support segments extended the width of said platform to pivotably connected at respective front and rear upper corners to said fixed sidewall; and

at least one hydraulic cylinder and piston member for movement of said second sidewall and front and rear upper support segments from said closed position to said raised position;
whereby said second sidewall in said raised position allows for unobstructed side assess to said platform for positioning of salvageable materials thereon, and said second sidewall in said closed position provides containment of the salvageable materials during towed transport over public roads.
8. The semi-trailer of claim 7 wherein said second sidewall including:
an upper support frame extended lengthwise between an upper front corner and an upper rear corner of said second sidewall when moved to said closed position adjacent said platform second side, said upper support frame supported for clamshell movement from said closed position adjacent said platform second side to said raised position above said platform;
a lower frame of sufficient width to extend from said upper support frame to a base edge of sufficient length to sealingly engage against said platform second side when said second sidewall is in said closed position;
said front upper support segment extended perpendicular from said upper front corner of said upper support frame for traversal of said platform above said front end wall, said front upper support segment extended to pivotably mount to said front corner junction of said fixed sidewall at an elevated height above said platform; and
said rear upper support segment extended perpendicular from said upper rear corner of said upper support frame for traversal of said platform above said rear end wall, said rear upper support segment extended to pivotably mount to said rear corner junction of said fixed sidewall at an elevated height above said platform;
whereby said second sidewall composed of said upper support frame, said lower frame, said front upper support segment and said rear upper support segment is moved in reversible clamshell movement between said closed position and said raised position.
9. The semi-trailer of claim 8 wherein said at least one hydraulic cylinder including a first and second hydraulic cylinder positioned vertically and exterior of respective mid-portions of said front and rear end walls;
said first hydraulic cylinder having an hydraulic piston pivotably attached at a base end to said rear end wall proximal of said platform, said first hydraulic piston having a distal end from which a first piston arm is reciprocatingly extended, said first piston arm having an actuator end pivotably attached proximal of a rear mid-portion of said rear upper support segment;
said second hydraulic cylinder having an hydraulic piston pivotably attached at a base end to said front end wall proximal of said platform, said second hydraulic piston having a distal end from which a second piston arm is reciprocatingly extended, said second piston arm having an actuator end pivotably attached proximal of a front mid-portion of said front upper support segment; and
a hydraulic system positioned exterior and adjacent said platform and including a hydraulic power generator and a plurality of hoses in fluid connection between said hydraulic power generator and respective first and second hydraulic cylinders;
whereby said hydraulic system being controllable by an operator for synchronized movement of said first and second piston arms for movement of said rear and front upper support segments and said second sidewall from said closed position to said raised position thereby providing unobstructed side access for positioning the crushed vehicles on said platform.
10. The semi-trailer of claim 9 wherein second sidewall further including:
said front upper support segment including a substantially triangular width in cross-section and having a reinforced central gusset member and a first lower support edge disposed in alignment above said front end wall when said second sidewall is moved to said closed position; and
said rear upper support segment including a substantially triangular width in cross-section and having a reinforced central gusset member and a second lower support edge disposed in alignment above said rear end wall when said second sidewall is moved to said closed position.
11. The semi-trailer of claim 10 wherein said front and rear pivot connection ends of said second sidewall further includes:
said front pivot connection end is releasably connected by a pivot pin to said front corner junction of said front end wall and said fixed sidewall; and
said rear pivot connection end is releasably connected by a pivot pin to said rear corner junction of said rear end wall and said fixed sidewall.
12. The semi-trailer of claim 11 wherein said platform supported by said multi-wheeled undercarriage further including a front support disposed under said platform front end wall, said front support is extendable to a supporting surface from maintenance of said platform in level configuration during loading and unloading, said front support is retractable during towed transport of said platform and multi-wheeled undercarriage when coupled to a tractor-trailer vehicle for transport on public roads.
13. A semi-trailer for contained transport of salvageable materials, comprising:
a platform supported by a multi-wheeled undercarriage for transport on public roads, said platform having an adequate width between first and second sides to receive a plurality of salvageable materials thereon, said platform including:
a fixed sidewall disposed to extend vertically along said platform first side;
front and rear end walls extended vertically from said platform and attached at respective front and rear corner junctions with said fixed sidewall;
a second sidewall having first and second support arms pivotably mounted proximally above respective front and rear walls for clamshell movement of said second sidewall between a closed position disposed in a substantially adjacent orientation along said platform second side, and a raised position disposed above said platform; and
a hydraulic system for reciprocating clamshell movement of said second sidewall, said hydraulic system including a hydraulic cylinder connected exterior of one of said front and rear end walls and having a hydraulicly actuated piston extended from said hydraulic cylinder, said piston is extended to connect proximal of a mid-portion of either said first and second support arms of said second sidewall for reciprocating movement thereof;
whereby said platform is loaded and unloaded through said open top when said second sidewall is in said closed position, and said platform is loaded and unloaded by unimpeded side access along said second side of said platform when said second sidewall is in said raised position above said platform.
14. The semi-trailer of claim 13 wherein said second sidewall including:
an upper support frame extended lengthwise between an upper front corner and an upper rear corner of said second sidewall when moved to said closed position adjacent said platform second side, said upper support frame supported for clamshell movement from said closed position adjacent said platform second side to said raised position above said platform;
a lower frame of sufficient width to extend from said upper support frame to a base edge having sufficient length to sealingly engage against said platform second side when said second sidewall is in said closed position;
a front upper support segment extended perpendicular from said upper front corner of said upper support frame for traversal of said platform above said front end wall, said front upper support segment extended to pivotably mount to said front corner junction of said fixed sidewall at an elevated height above said platform; and
a rear upper support segment extended perpendicular from said upper rear corner of said upper support frame for traversal of said platform above said rear end wall, said rear upper support segment extended to pivotably mount to said rear corner junction of said fixed sidewall at an elevated height above said platform;
whereby said second sidewall composed of said upper support frame, said lower frame, said front upper support segment and said rear upper support segment is moved in reciprocating clamshell movement between said closed position and said raised position.
15. The semi-trailer of claim 14 wherein said hydraulic system further including:
a first hydraulic cylinder having a base pivotably connected to an exterior portion of said front end wall and having a first hydraulicly activated piston extended to attach at a pivoting connection disposed on a mid-portion of said first support arm of said second sidewall;
a second hydraulic cylinder having a base pivotably connected to an exterior portion of said rear end wall and having a second hydraulicly actuated piston extended to attach at a pivoting connection disposed on a mid-portion of said second support arm of said second sidewall; and
a hydraulic power generator and a plurality of a hydraulic hoses positioned in fluid connection between said hydraulic power generator and respective first and second hydraulic cylinders;
whereby said hydraulic power generator being controllable by an operator for synchronized movement of said first and second hydraulicly actuated pistons for movement of said upper front and rear support arms and said second sidewall from said closed position to said raised position thereby providing unobstructed second side access for loading and unloading salvageable materials on and off of said platform.
16. The semi-trailer of claim 15 wherein said second sidewall further including:
said front upper support segment including a substantially triangular width in cross-section and having a reinforced central gusset member and a first lower support edge disposed in alignment above said front end wall when said second sidewall is moved to said closed position;
said rear upper support segment including a substantially triangular width in cross-section and having a reinforced central gusset member and a second lower support edge disposed in alignment above said rear end wall when said second sidewall is moved to said closed position;
said front upper support segment having a front pivot connection end releasably connected by a pivot pin to said front corner junction of said fixed sidewall at said elevated height above said platform; and
said rear upper support segment having a rear pivot connection end releasably connected by a pivot pin to said rear corner junction of said fixed sidewall at said elevated height above said platform.
17. The semi-trailer of claim 16 wherein said platform is supported by said multi-wheeled undercarriage including a front support disposed under said front end wall, said front support is extendable in length to contact a supporting surface for level orientation of said platform during loading and unloading, said front support is retractable during towed transport of said platform and wheeled undercarriage when coupled to a tractor-trailer vehicle for transport on public roads.