A.流量(1~2L/min)浓度(25%~29%)
B.流量(2~4L/min)浓度(29%~37%)
C.流量(4~6L/min)浓度(45%~53%)
D.流量(6~8L/min)浓度(45%~53%)
E.流量(8~10L/min)浓度(53%~61%)