据我所知,目前我国各设计科研单位绘制的图纸,都是通过晒图后再用氨水薰过而得出蓝图以供使用的。我从1963年起至今一直从事工业与民用建筑的设计、施工等工作,独立完成工程项目设计一千余项,亲自晒蓝图达七万多张。六十年代,我晚上自制晒图纸,白天晒图;后来买晒图纸晒图;现在是机械晒图,但是薰图一直是采用氨水。我 As far as I know, drawings drawn by various design and scientific research institutes in China are all blueprinted for use after they have been sprayed with ammonia. I have been engaged in the design and construction of industrial and civil buildings since 1963. I have independently completed more than 1,000 project designs and personally printed more than 70,000 blueprints. In the 1960s, I made homemade blueprints in the evening and printed photos in the daytime; I bought blueprints for drying in the sun. I now use mechanical blueprints, but my paintings use ammonia. I