Lamp shell surface cover ring for standard size, suitable for all kinds of lamps installation;
灯壳面盖环为标准尺寸，适合各种灯具的安装装配；
The seal assembly comprises a seal ring, a seal ring shell and bellows.
密封组件包括密封环、密封环壳体和波纹管。
The seal ring shell has a front piece and a back piece secured together.
密封环壳体具有紧固在一起的前件和后件。
The seal ring shell has a front piece and a back piece secured together.
密封环壳体具有紧固在一起的前件和后件。
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