地下燃气管道与给水管、排水管或其他燃气管道之间的垂直净距不得小于( )。A.0.1m B.0.15m C.0.20m D.0.25m

作者: rantiku 人气: - 评论: 0

问题地下燃气管道与给水管、排水管或其他燃气管道之间的垂直净距不得小于( )。

选项 A.0.1m B.0.15m C.0.20m D.0.25m

答案 B

解析

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