enclosed housing
... 封闭式输送管道 enclosed conveyer conduit 封闭式箱体 enclosed housing 封闭式蓄电池 enclosed accumulator ...
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箱体预制复合环形封闭式地线网，并且在箱体上部留出接地极；
The box body prefabricates a compound ring enclosed type ground net, and an earthing pole is reserved at the upper part of the box body;
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