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围 岩 分 类 参 考 表

Release date:2017-05-25  author:林  Browse times:7080
围岩基本稳定,较长时间不支护会出现小块掉围岩基本稳定,较长时间不支护会出现小块掉围岩基本稳定,较长时间不支护会出现小块掉围岩基本稳定,较长时间不支护会出现小块掉围岩基本稳定,较长时间不支护会出现小块掉

 
Key word: 地质 采矿
 
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