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采用水平分層垮落法回采時,上一分層的采煤工作面超前下一分層采煤工作面的距離,應在作業規程中規定。????(????)

作者:煤礦安全網 2022-06-10 11:51 來源:煤礦安全網 水平 垮落法 工作面 距離 規程
題目信息:

  采用水平分層垮落法回采時,上一分層的采煤工作面超前下一分層采煤工作面的距離,應在作業規程中規定。()

  A:正確 B:錯誤

答案

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