chamber mining 中文意思是什麼
chamber mining
解釋
房式開采-
Chamber blasting test for small scale sandsyone mining
砂石料場開采小型硐室爆破試驗 -
Rockfill materials mining technology by chamber blasting on hard rockmass
堅硬巖體上堆石料硐室爆破開采技術研究 -
Specifications on inspection of ventilation and safety in coal mining work face and main chamber
煤礦採掘工作面及主要硐室通風安全檢測規范
分享友人