A.0.40kPa(3mmHg) B.0.67kPa(5mmHg) C.1.07kPa(8mmHg) D.1.33kPa(10mmHg) E.2.00kPa(15mmHg)
A.0.67~1.33kPa(5~10mmHg) B.1.33~2.00kPa(10~15mmHg) C.2.00~4.00kPa(15~30mmHg) D.4.00~5.33kPa(30~40mmHg) E.5.33~8.00kPa(40~60mmHg)
A.0.5cm B.1.0cm C.1.5cm D.2.0cm E.2.5cm