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巷道冒頂?shù)念A(yù)兆有哪些？

2020-10-19 09:55:40 來(lái)源：煤礦安全生產(chǎn)網(wǎng) 瀏覽量：807 
		          
巷道冒頂?shù)念A(yù)兆有哪些?


答：響聲、掉渣、片幫、裂縫、漏頂、脫層等。
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