攻螺纹 meaning in English

tapping

Diameters of drills for minor diameters of tapped threads
攻螺纹内径用钻头直经
Modular units for machine tools . multispindle heads . tapping reproducers
组合机床动力头.多轴头.攻螺纹复制机
Subland twist drills with morse taper shanks for holes prior to tapping screw threads
攻螺纹前孔用莫氏锥柄多刃阶梯麻花钻
Modular units for machine tools . multispindle heads . tapping spindles . normal series
组合机床动力头.多轴头.攻螺纹轴.通用系列

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