shield mining method 中文意思是什麼
shield mining method
解釋
盾蓋式開采法-
Discussion on some technical issues relating to the shield mining method
掩護支架採煤法若干技術問題探討 -
Coal mining method in the deeply inclined coal seams with hydraulic powered shield supports on single leg sustai
大傾角煤層單腿支撐式柔性掩護支架採煤法
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