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采煤工作面顶板来压特征
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采煤工作面顶板来压特征
A、来压显现程度
B、来压步距
C、来压强度
D、工作面推进度
时间:2021-09-03 16:51
关键词:
联大
河南理工大学
矿山压力及其控制
答案解析
A@#@B@#@C
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