A.≤0.22MPaB.≤0.20MPaC.≥0.22MPaD.≥0.20MPa
A.>0.12MPaB.≥0.12MPaC.>0.10MPaD.≥0.10MPa
A.50±5℃B.52±5℃C.50±2℃D.52±2℃