A.<0.4MPa B.<0.5MPa C.>0.5MPa D.>0.7MPa
A.0.1MPa~0.3MPa B.0.3MPa~0.5MPa C.0.5MPa~0.7MPa D.0.7MPa~0.9MPa
A.<-40℃ B.<-50℃ C.<-60℃ D.<-70℃