A .人口管径400mm,多级油泵,总扬程250m,2级泵
B .流量400m3/h,多级油泵,总扬程250m,2级泵
C .扬程400m,多级油泵,流量250m3/h,2级泵
D .入口管径400mm,多级油泵,单级扬程250m,2级泵