| 摘要 |
A trailer includes a ramp having an end attached to the trailer for pivotal movement of the ramp between a raised gate position and a lowered, inclined loading position. An elongate support is attached to the trailer adjacent to the end of the ramp, and a tension spring encircles the support and has a first tag end coupled to the end of the ramp and a second tag end coupled to the trailer and winding and unwinding in response to movement of ramp between the raised gate position and the lowered, inclined loading position, respectively.
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