dewcap

常见例句

Any telescope in bright local lights should also have a long dewcap or side shield to keep the light out of the tube.
西面的墙是用黑布做的，绳索用于增加整个建筑的稳定性。
The tube and dewcap are painted, the machined metal parts are hard anodized, and the tube rings are satin-finished aluminum castings.
全镜金属制作并作氧化镀层,而且镜桶是整体一次完成的铝铸件，运行极其精密顺化。