A.0.2-0.4mol/l B.0.5-0.8mol/l C.0.2-0.8mol/l
A.10Kpa~20Kpa B.15Kpa~25Kpa C.10Kpa~25Kpa
A.3Kpa~8Kpa B.5Kpa~8Kpa C.5Kpa~10Kpa