pillar-and-room method 中文意思是什麼
pillar-and-room method
解釋
房柱法-
Analysis on developing new room and pillar mining method in shendong coalfield
神東煤田發展新型房柱式採煤方法的分析 -
Technical analysis on feasibility of new room and pillar mining method
新型房柱式採煤法可行性技術分析 -
Application practice of pre - truncating crest room - and - pillar method at houzhuang mine
預切頂房柱采礦法在侯莊礦區的應用實踐
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