A.50% B.60% C.70% D.80%
A.50-60% B.55-60% C.55-65% D.60-65%
A.2.5-4.2L/min.m2 B.2.5-4.0L/min.m2 C.2-4L/min.m2 D.2-4.2L/min.m2