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顶板下沉量是指活柱下缩量、顶梁的压缩量的总和。()
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顶板下沉量是指活柱下缩量、顶梁的压缩量的总和。()
A、正确
B、错误
时间:2021-09-02 13:37
关键词:
联大
河南理工大学
矿山压力及其控制
答案解析
B
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