管壁孔;管螺纹丝锥;管用丝锥;管子螺丝锥;锥管螺纹;分接管
Combined taper pipe tap and core drill
扩孔钻和锥管丝锥复合刀具
Combined pipe tap and drill Pile Construction Technology with Dig, Clash and Bore Method in Rock Solute Ground
岩溶条件下的桩基采用挖、冲、钻相结合的施工技术
Composite cubic boron nitride turning tool combined pipe tap and drill
立方氮化硼复合车刀管用钻孔攻丝复合刀具
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