A.泵吸水口徑 B.泵出水口徑 C.泵設(shè)計(jì)點(diǎn)單級(jí)揚(yáng)程 D.泵的級(jí)數(shù)
A.5%~10% B.10%~30% C.30%~40%
A.Pabs B.Pa C.Pv