A.4% B.5% C.6% D.7%
A.0.01MPa B.0.1MPa C.0.5MPa D.0.2MPa
A.520MPa,545MPa,555MPa B.525MPa,545MPa,550MPa C.520MPa,520MPa,550MPa D.520MPa,545MPa,550MPa
A.600 B.1000 C.2400 D.4000
A.煤油 B.汽油 C.菜油 D.礦物油