手动执行器轴是单导短梯形螺纹，带一件重型焊接夹子。
Manual actuator stems are single lead stub acme threads with one piece heavy duty clip welded on.
采用井下仰斜钻孔双端堵水器导高观测技术对白庄煤矿综放开采条件下，覆岩破坏规律进行了实测，得出了导水断裂带的发育高度。
Adopting survey technology of double-head water-stopped machine flowing high of upward-inclined drillhole rock destruction rules were surveyed, development height of water conducted zone was gained.
一种带定位器的骨科导钻，用来引导骨钻钻孔方向。
A kind of orthopedics guide drill with a positioning device is used to guide the direction of the bone drill in drilling.
一种带定位器的骨科导钻，用来引导骨钻钻孔方向。
A kind of orthopedics guide drill with a positioning device is used to guide the direction of the bone drill in drilling.
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