| 摘要 |
A portable ramp usable to raise the wheels of an automobile, truck, trailer or the like from the floor so as to ease seeing or working on the underside of the vehicle. The ramps are mounted on wheels to make the portability easier. The wheels, in turn are hinged to the ramp so that they can be used to raise the ramp off the floor for portability or to be retracted to allow the ramp to be firmly placed on the floor. The ramp is constructed to be securely held in place as the vehicle enters it.
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