A.1個DN150和2個DN100 B.1個DN150和1個DN65 C.1個DN100和2個DN65 D.1個DN100和1個DN65
A.大于20L/s B.小于等于20L/s C.大于15L/s D.小于等于15L/s
A.60m B.100m C.120m D.150m