新建文本文档在文档中输入以下内容：统计cad图中线的总长度Write By zhenglin(defun c:tj_l ( p n e e1 e2 l s x1 x2 y1 y2 xx yy ll lll) (setq ln 0 lll 0) (setq p (ssget)) Select objects (if p (progn

UG编程手册目 录准备几何(Prepare Geometry)-------------------------------(2)介绍(Introduce)---------------------------------(4)加工功能菜单(File)----------------------------(5)加工流程 (Machining Flow)-----------------