A.≥11 B.≥9.5 C.>11 D.>9.5
A.35MPa B.25MPa C.16MPa(或21MPa) D.35MPa(或25MPa)
A.7MPa±0.1MPa B.7MPa±0.3MPa C.7MPa±0.5MPa D.7MPa±0.7MPa