由于现代工业的发展,工业烟囱中大量尘埃飞入空间,致使一座座造型大方、色调素雅的外粉刷大厦,往往还有没竣工,楼的上部就出现道道污痕。怎样防止外粉刷污染呢?现提出几种方案,供参考:1.对于有上盖的外粉刷楼房, 房檐可采用图1做法,这样,雨水就只能下流。2.对于无上盖的外粉刷楼房,上檐可采用图2、3所示的做法,这样,雨水就只能流入下水管。这几种做法都可不同程度地减少雨水外流,有效地控制污迹的出现。 Due to the development of modern industry, a large amount of dust in the industrial chimney flies into the space, resulting in an exterior painted building with generous shapes and elegant colors, often with no completion. How to prevent the outer paint from being polluted? Several schemes are proposed for reference: 1. For an outer-painted building with an upper cover, the eaves can adopt the practice of Figure 1, so that the rain can only flow down. 2. For the exterior-painted buildings without top covers, the upper jaw can use the practices shown in Figs. 2 and 3 so that rainwater can only flow into the sewage pipes. All these methods can reduce the outflow of rain to varying degrees and effectively control the appearance of smudges.