AutoCAD+电气元件库http://cache.baidu.com/c?word=%B5%E7%C6%F8%3B%D4%AD%C0%ED%3B%CD%BC%3B%B5%C4%3B%C8%ED%BC%FE&url=http%3A//bbs%2Everycd%2Ecom/topics/329134/&b=0&a=2&user=baidu