A .1.5~2.0kPa(11~15mmHg)
B .2.6~3.5kPa(20~26mmHg)
C .4.0~5.3kPa(30~40mmHg)
D .5.3~6.5kPa(40~49mmHg)
E .6.0~7.3kPa(45~55mmHg)