metric unit

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.

介绍了米制梯形螺纹车削加工用户宏程序的编制和简单调用的方法,对提高数控机床的使用性能有很大的帮助,对其它非标螺纹的编程也具有一定的借鉴意义。

Finally a unified metric system for font measurement is proposed,based on an in-depth discussion on the defici.

最后,在深入分析讨论号制和点制的种种缺陷的基础上提出字形度量全球统一使用米制的构想。