shaft stationary sleeve
常见例句
- 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;
工作台的夹持附件装置，它包括基座、顶撑杆件及压板，其特征是：基座底端向下突伸一固定轴部，并轴向地贯穿一套孔；
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