tap wrench

1. Therefore, the overthread screw tap can be matched with a pneumatic wrench having regular hexagonal holes via insertion, and the overthread screw tap has the advantage of high work efficiency.
   其扭力段由正四棱柱形改为正六棱柱形的，这样可以与有正内六角孔的风动扳手相插配使用，有提高工效的特点。
2. The control proves to be mechanically strong and rigid by testing, and a hand electric drill equipped with it can be used as motordriven tap, wrench, screwdriver, etc.
   经测试，机械特性硬，手电钻配上此控制器后，能作电动攻丝、板手、螺丝刀等作业，实现一机多用。

noun

1. a wrench for turning a tap to create an internal screw thread