Shade is made of transparent material, cast aluminum enclosure, watertightstructure.
灯罩由透明材料，铸铝外壳，防水结构。
2
The design of structure, hardware and software of the alarm control system of the distributed watertight door has been described in this paper.
该文简要讲述了分布式水密门报警控制系统的结构、硬件和软件的设计。
3
The diving chamber is a watertight compartment with air pipes, the lifting support is a girder structure, and the lead rails are arranged under and below the lifting support;