retracting spring tooth pickup cylinder的意思|示意

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缩回弹簧齿拾取气缸

伸缩弹指式捡拾滚筒 ... 伸缩式天线杆 collapsible mast 伸缩弹指式捡拾滚筒 retracting spring tooth pickup cylinder 伸缩接合 expansion and contraction joint ...