dual circulation drilling的意思|示意
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双循环钻井
dual circulation drilling的网络常见释义
双循环钻进 ...) 关键字: 坑道钻探;双循环钻进;双壁钻具;冲洗液漏失[gap=1569]Key words: tunnel exploration; dual circulation drilling; double-wall drill tools; drilling fluid leakage...