详细介绍了双转盘转向结构的参数优化方法、平板拖车牵引杆长度及挂钩位置确定方法、牵引车挂钩位置确定方法，并对产生跟随性误差的原因进行了分析。
This paper presents parameter optimization of double-table turning structure, determination of trailer's draw bar length and hook positions of both the trailer and tractor.
安装灯具时，灯具上升到自动挂钩 卸荷装置的位置后自动挂到吊钩的钩形槽里；
When installed, the high-pole lamp is automatically hung in a hook-shaped trough of the hanging hook after raising to the position of the automatic hanging and unloading gear;
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