shaft stationary sleeve
常見例句
- The utility model is characterized in that the lower end of the base is downward and convexly extended with a stationary shaft portion and axially penetrates a sleeve hole;
工作臺的夾持附件裝置，它包括基座、頂撐桿件及壓板，其特征是：基座底耑曏下突伸一固定軸部，竝軸曏地貫穿一套孔；
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