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transition from underground mining to surface mining
释义
transition from underground mining to surface mining
Encyclopedia
工学
露天与地下联合开采
释
transition from underground mining to surface mining
地下转露天开采
前期用地下开采矿床下部矿体,后期过渡到用露天开采矿床上部矿体的开采方式。
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center of an ellipse
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Center of Environmental Emergency and Accident Investigation, Ministry of Ecology and Environment of the People's Republic of China
center of expansion
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Center of gravity method for facility location
center of gyration
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center of interest
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