A.2% B.5% C.10% D.15%
A.比轉(zhuǎn)數(shù)與流量成反比與揚(yáng)程成正比 B.比轉(zhuǎn)數(shù)與流量成正比與揚(yáng)程成反比 C.比轉(zhuǎn)數(shù)與流量成反比與揚(yáng)程成反比 D.比轉(zhuǎn)數(shù)與流量成正比與揚(yáng)程成正比
A.泵軸每秒鐘旋轉(zhuǎn)的次數(shù) B.泵軸每分鐘旋轉(zhuǎn)的次數(shù) C.葉輪每秒鐘旋轉(zhuǎn)的次數(shù) D.電機(jī)每刻釧施轉(zhuǎn)的次數(shù)