... 螺旋轴helical spline shaft 后轴体rear shaft body 活塞体piston body ...
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The wheel shaft is connected at the lower side of the rear end of the car body, and can swing and move front and back.
与主动后轮同一轮轴的从动后轮，其可呈空转状态，该轮轴并连接于底盘后端下方，而可前、后幌动移动；
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