单项选择题
A.≥300MPa B.≥500MPa C.≥300N/cm D.≥500N/cm
A.≥100MPa B.≥100N/cm C.≥100N/m D.≥100N/mm
A.断裂伸长率应≤10% B.断裂延伸率应≤10% C.最大力伸长率应≥10% D.断裂伸长率应≥10%
A.屈服拉力应≥275N/cm B.最大拉力应≥270N/cm C.断后拉力应≥270N/cm D.断后拉力应≥275N/cm
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