48 《煤矿安全规程》规定，掘进巷道不得采取_______ 通风。 A.扩散 B.风墙导风 C.引射器通风 D.风筒导风 - 查题网

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河南成教 / 矿井通风与安全

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48

《煤矿安全规程》规定，掘进巷道不得采取_______ 通风。

A.扩散

B.风墙导风

C.引射器通风

D.风筒导风

积分

矿井通风与安全

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