“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	sigma-compactness sigma-compact set sigma-compact space sigma-complete sigma-complete ideal sigma-complete lattice sigma-completeness sigma complete vector lattice sigma complex sigma discrete family sigma-discrete family sigma electron sigma field sigma-field sigma field of events sigma-field of events sigma-field of sets sigma field prior to tau sigma-field prior to tau sigma-field prior to τ sigma-field strictly prior to τ sigma-finite sigma finite measure sigma-finite measure sigma-finite measure space

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