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underground mine development
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underground mine development
Encyclopedia
工学
矿床地下开拓
释
underground mine development
矿床地下开拓
为开发地下矿床,从地表向地下掘进一系列井巷通达矿体,使地表与矿床之间形成一条完整的运输、提升、通风、排水、动力供应等生产服务系统的地下工程。简称矿床开拓。
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switching overvoltage of electric power system
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