说明：  CAD应用小插件，绘图过程中，插入块自动断线，不用人工断线，使用方法，CAD中输入命令AP,加载该插件即可。
(CAD application plug-in, in the drawing process, the insert block is automatically disconnected, no manual disconnection, use method, enter the command AP in CAD, load the plug-in. |)