... cast steel spiral casing 铸钢蜗壳 steel wall casing 钢沉井 shaft steel casing 钢井壁 ...
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steel wall casing
钢壁套管
以上为机器翻译结果，长、整句建议使用 人工翻译 。
An iron ore shaft in Hebei was constructed by drilling. After removal of steel casing in the shaft, water leaked around the shaft wall.
河北省某铁矿竖井采用钻井法施工，拆除井筒钢护壁后出现井筒漏水。
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