A.0.2~0.6kPa(20~60mmH2O)
B.0.7~2.0kPa(70~200mmH2O)
C.2.1~3.0kPa(210~300mmH2O)
D.3.1~3.6kPa(310~360mmH2O)
E.3.7~4.6kPa(370~460mmH2O)