Abstract: Using the order “Wipeout” in AutoCAD to set up a graphic symbol database in chemical engineering equipment with a two dimension graphs conceal function. The method for established the hidden boundaries was introduced, and the hidden problem of non-closed boundary graphic symbol was resolved. Compare the method with the usually breaks in on lines to set up a graphic symbol database in chemical engineering equipment, It does not affect graphic edit again because that is not necessary to breaks in on lines. The method is more efficiently, and the program was written by AutoLISP in AutoCAD.

Key words: AutoCAD , Hidden boundaries , Chemical engineering equipment , Graphic symbol , Two dimension hide

摘要：  利用ＡｕｔｏＣＡＤ提供的Ｗｉｐｅｏｕｔ命令建立具有二维消隐功能的化工设备图形符号库。提出建立隐藏边界方法，解决了非封闭边界图形符号的消隐问题。使用该方法建立的化工设备图形符号库与通常普遍采用的断线法技术相比较，由于不需断开连接线，不影响图形的再编辑，可有效地提高绘图效率，并采用ＡｕｔｏＣＡＤ内嵌的ＶｉｓｕａｌＬＩＳＰ语言编程实现。

关键词: ＡｕｔｏＣＡＤ , 　隐藏边界 , 　化工设备 , 　图形符号\二维消隐