A.1/2~1/3 B.1/3~1/4 C.1/4~1/5
A.30 min B.60 min C.90 min D.120 min
A.1/8-1/10 B.1/5-1/8 C.1/8-1/15 D.1/10-1/15
A.12 B.15 C.20 D.25
A.220~260 kPa B.340~380 kPa C.420~450 kPa D.520~580 kPa