mine shaft lining是什么意思 mine shaft lining怎么读
mine shaft lining的用法和样例
- The mine flooding happed during construction of the air shaft in Qidong Coal Mine.
祁东煤矿风井在建井过程中，发生钻井井壁突水事故，井筒被淹。 - Based on the test results, the design method of vertical bearing capacity of the retractable drilling shaft lining was obtained.
由此提出了可缩性钻井井壁竖向承载力的设计方法。
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