roof radiant tubes
... roof opening 罐顶开口 roof radiant tubes 顶辐射管 roof rock 盖岩 ...
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它运用定向顶管施工方法把镁带牺牲阳极呈辐射状水平地直接埋设在罐底下,然后与罐底板连通。
Magnesium ribbon anodes are installed in radial pattern beneath the tank bottom by directional drilling and then connected electrically with the bottom.
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