Tread is machined using numerical - control machine. Mill tool is designed.
在数控铣床上加工螺纹，需要设计盘形铣刀。
It is Feasible to lathe or mill Variational Pirch in a Reconstructive Common lathe with 3-coordinate Numerical Control Syslem or 2-coordinate Numerical Control Syslem in series.
使用三坐标数控系统或串联使用两套二坐标数控系统，均能在改造的普通车床上实现零件的车铣削方式加工。
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