block carving coal mining method是什麼意思、英文翻譯及中文解釋
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詞語: block carving coal mining method
解釋: 大塊崩落採煤法
詞典: 貿易專業英漢詞典
block carving coal mining method 相關解釋
大塊崩落採煤法 block carving coal mining method