1. Dynamic interference between the cotter pin and axle housing in the bridge / Fortuitous <br>2. Uneven installation gap between the leaf spring guide plate <br>3. Dynamic interference of the input shaft knocking deformation / Fortuitous <br>4. There is no trace of knocking in the deformation of the dust plate, and the frame is initially suspected During the process, the sling will drag the dust board and cause deformation.
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