The back ends of the dilation arms are connected in series on the supporter through the movable slide ways on the movable disk.
扩张臂的后端通过移动盘上的移动滑道串联在支撑架上。
The back ends of the dilation arms are connected in series on the supporter through the movable slide ways on the movable disk.
扩张臂的后端通过移动盘上的移动滑道串联在支撑架上。
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