Shade is made of transparent material, cast aluminum enclosure, watertight structure.
灯罩由透明材料，铸铝外壳，防水结构。
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。
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;
潜水舱是带有通气管的水密舱，升降支架为桁 架结构，升降支架的上下设有导轨。
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