煤矿企业安全生产

冒顶区的正常通风如一时不能恢复，则必须利用( )向埋压或截堵的人员供给新鲜空气。

发布于 2021-03-23 18:25:01

【多选题】
A 压风管
B 巷道
C 水管
D 打钻

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何小帅 2023-03-23

时间顺流而下，生活逆水行舟。

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133****6912

这家伙很懒，什么也没写！

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