这是王树岗站的接触网安装布置图，有利于学习接触网布置的同学。-Wang Gang Station Catenary installation layout is conducive to learning the layout of the students of OCS.

AutoCAD2010二次开发实例教程ObjecARX，王文波著(AutoCAD2010 programming with Objecarx, written by Wang Wenbo)