对于同一煤气管道,当压力始终保持不变的情况下,孔板的直径越大,煤气流量将越()。A.

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问题:

对于同一煤气管道,当压力始终保持不变的情况下,孔板的直径越大,煤气流量将越()。

A.大

B.小

C.不变

D.以上都不对

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