Drilling and blasting are important components in mine construction design.
钻眼爆破工作是矿山施工设计的重要组成部分。
Underground tunnel support of soft expansion rock is a main difficulty in mine construction currently.
松软臌胀岩层的井下巷道支护是目前矿山建设中的一个主要难点。
CHAPTER II GUARANTEES FOR SAFETY IN MINE construction.
第二章矿山建设的安全保障。
CHAPTER II GUARANTEES FOR SAFETY IN MINE construction.
第二章矿山建设的安全保障。
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