我厂引进国外压路机的驾驶室有520×220mm的长方形天窗孔。驾驶室顶棚板面积为1450×1565 mm,共约2.3m～2,顶棚板为1.5mm厚的钢板。国外的做法是在顶棚板上直接开长方形孔,天窗与顶棚板装配时中间垫一层厚度为3 mm的海绵橡胶板,并在顶棚板的长方形孔周边涂刷密封胶(如图1),再用M5自攻螺钉紧固。 Our factory has introduced a 520×220mm rectangular sunroof aperture in the cab of foreign road rollers. The ceiling area of ​​the driver’s cab is 1450×1565 mm, which is about 2.3m～2. The ceiling plate is 1.5mm thick steel plate. The practice in foreign countries is to open a rectangular hole directly in the ceiling plate. When the sunroof and the ceiling plate are assembled, a layer of sponge rubber with a thickness of 3 mm is to be interposed, and a sealant is applied around the rectangular hole of the ceiling plate (see Figure 1). Then tighten with M5 tapping screws.