P=ρ△h=ρ(h2-h1)=0.7(20-0.5)=13.65噸/米2=1.365千克/厘米2
N=NEK/η=7.5×1.1/0.54=152.8KW
N軸=(100*60*1000)/(3600*102*0.6)=27.3KW