A.1Lu B.2Lu C.3Lu D.5Lu
A.L/(min.m.m) B.(L/min)/(m.MPa) C.L/(m.MPa) D.(L/min)/(min.m.m)
A.先上游,后下游,最后中間排 B.先下游,后中間,最后上游排 C.先上游,后中間,最后下游排 D.先下游,后上游,最后中間排