| 摘要 |
A flat-bed truck system and method for efficiently delivering and unloading items using special crane, lift or hoist elements. The cranes are foldable downward into a horizontal position. Lower plural and parallel drive elements are used to drive upper pivoting arms which are connected by a cross-bar element. The cranes are designed with a low center of gravity so they may be positioned at various points around the bed of the truck. The lower plural drive elements are fixed in a horizontal position by brackets which may be easily applied and removed.
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