泵房内管道管外底距地面的距离,当管径DN≤150mm时,不应小于( );当管径DN≥200mm时,不应小于( )。
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A、0.20m,0.25m
B、0.30m,0.35m
C、0.20m,0.30m
D、0.15m,0.25m
参考答案:
A、0.20m,0.25m
B、0.30m,0.35m
C、0.20m,0.30m
D、0.15m,0.25m
参考答案: