A.≥40℃ B.≥50℃ C.≥60℃ D.≥70℃
A.≤0.2MPa B.≤0.3MPa C.≥0.2MPa D.≥0.3MPa
A.≤0.1MPa B.≤0.2MPa C.≥0.1MPa D.≥0.2MPa