The semi -trailer support for our company can be used for the use of different types of semi -trailers. The structure of the tight inner and outer tube and the enhanced installation plate is adopted, the cold plug screw, the poor forging gear, and the Sixuan seat adopts a floating structure design, and the thread is sealed in the lubricating fat cavity so that the boxing nuts are lifted in the supporting device in the support device Receive new oil lubrication in the upper and lower exercises, save effort, and be able to carry.

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