The machine can turn about 200 kinds of the metric, imperial, module and DP thread with knob, no need to change gears.
本机可以打开约200多种的公制，英制，模块和DP螺纹旋钮，没有必要改变齿轮。
2
To improve the performance of NC machine tool, the paper introduces the method of custom macro programming technique and simple call on transfer process of the metric system ACME screw thread.