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开采单元
矿床开采时,将矿床在空间上按垂直方向和水平方向划分成的离散单元。
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Jiangxi Jiulianshan Guojiaji Ziran Baohuqu
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Jiangxi Poyang Lake National Nature Reserve
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Jiangxi Provincial Science and Technology Museum
Jiangxi Publishing Group Co.,Ltd.
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