| 摘要 |
Wheeled elevator apparatus for use in loading and unloading freight into and out of a highway truck; the apparatus including a platform raised and lowered by hydraulic power engaging lever arms arranged in a parallelogram structure, drawbridge access ways from the platform to the truck bed and from the platform to the loading/unloading level, the access directions being perpendicular to each other, wheels for moving the apparatus from place to place, and jacks for securing the apparatus off its wheels.
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