A.50℃ B.60℃ C.70℃ D.75℃
A.0.10MPa~0.23MPa B.0.15MPa~0.3MPa C.0.15MPa~0.33MPa D.0.2MPa~0.33MPa
A.0.68MPa B.0.72MPa C.0.78MPa D.0.84MPa