combined pipe tap and drill

攻丝... ... ) vibration-assisted tapping 振动辅助攻丝 ) combined pipe tap and drill 管用钻孔攻丝复合刀具 ) silk awl 丝攻 ...

pipe管道词汇 ... ... combined pipe tap and drill 管丝锥钻头复合刀具; 管用钻孔攻丝复 合刀具 ? communicating pipe 连通管 ? ...