底图是一种复制工具,在生产和科技开发中,一份底图往往要晒几十份,甚至上百份蓝图。晒图时,主要是利用晒图机中的紫外线灯对晒图纸进行感光,而紫外线对纸张的破坏作用比一般光线大得多,加之晒图过程中的机械磨损,使底图容易老化、破碎。为了防止底图的破碎,我们使用的方法是用缝纫机“扎边”。这种 The basemap is a replication tool. In production and technology development, a basemap often requires dozens or even hundreds of blueprints. In the case of sunbathing, the sunblocking machine mainly uses the ultraviolet light to sense the sunblown paper, and the damaging effect of the ultraviolet light on the paper is much greater than that of the ordinary light. In addition, mechanical abrasion during the tanning process makes the base map easy to be aged and broken. In order to prevent the broken base map, we use the sewing machine is “tie bar.” This