纸张A8A7A6A5A4A3A2A1A0纸张大小52mm*74mm74mm*105mm105mm*148mm148mm*210mm210mm*297mm420mm*297mm420mm*594mm841mm*594mm幅面面积（㎡）0.0038480.07770.0150.031080.062370.124740.249480.496百分比1/2561/1281/1/321/161/81/41/21CAD比例（1:100）5.2m*7.4m7.4m*10.5m10.5m*14.8m14.8m*21.0m21m*29.7m42m*29.7m42m*59.4m84.1m*59.4m84.1m*1.1m841mm*11mm0.999949例如A3纸张按照1：:100比例打印设计图纸！先打开CAD，画42000*29700矩形。若画出线段超出界面，则先画一条大于42000的直线（例如1000000），然后左键选中Z回车再E回车回复界面大小，就可以按照比例绘制图纸了！
