说明：  此代码为Lisp语言编写，是使用AutoCAD软件的配合使用利器，此代码包含内容庞大，可以用于建筑、公路、桥梁、市政等行业，可以大幅度提高绘图速度和质量。功能涵盖丰富。
(This code for the Lisp language, is the use of AutoCAD software for use with a sharp object, this code contains the contents of large, can be used for buildings, roads, bridges, municipal, etc., can greatly improve the speed and quality graphics. Feature-rich coverage.)