mine shell 中文意思是什麼
mine shell
解釋
地雷殼體-
Shell theory and research on mine safety management
界殼論與礦山安全管理界殼基礎研究 -
Analysis of shell bolting and shotcrete supporting and their application in the yanzhou mine
網殼錨噴支護理論分析及其在兗州礦區的應用
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