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______ 是防治冲击矿压的有效办法和根本性的 ______ 。
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______ 是防治冲击矿压的有效办法和根本性的 ______ 。
时间：2021-09-02 15:22
关键词：
联大
河南理工大学
矿山测量学
答案解析
开采解放层 @#@ 区域性防范措施。
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