“shaft deepening”的概念、定义、翻译、参考文献-科学参考

单词	shaft deepening
释义	shaft deepening Encyclopedia 工学普通凿井法释 shaft deepening井筒延深多水平开拓的矿井中，将生产竖井延深到新水平的施工工艺。
随便看	thorium hydroxide thorium lead age thorium mineral thorium mining and metallurgy thorium nitrate thorium ore thorium series thorium spent fuel reprocessing thorium-uranium cycle thorn Thorndike Thorne-Zytkow object Thornton Wilder thorny elaeagnus fruit thorny oysters thorotungstite thorough bass thoroughbred thoroughfare channel thoroughfare vessel Thoroughly Revised Materia Medica thorowax root Thorstein Bunde Veblen thoruraninite Thor Vilhjálmsson

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