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介绍了用于数控机床电气系统计算机辅助设计的ＮＣ—ＣＡＤ软件包，着重分析了两元件间连线命令的设计及用户接口的设计与实现．
The NC-CAD software package for computer aided design of CNC machine tool electrical system is introduced. The design and implementation of the user interface and the design of the wiring command between two components are emphatically analyzed.