A.10~50mmH2O B.50~70mmH2O C.70~180mmH2O D.100~200mmH2O E.180~300mmH2O
A.0.1~0.2ml B.0.3~0.5ml C.0.5~0.8ml D.0.8~1.0ml E.1.0~2.0ml
A.0.1~0.2ml B.0.2~0.3ml C.0.3~0.4ml D.0.4~0.5ml E.0.5~0.6ml