螺栓的性能等级为8.8级,描述该螺栓材料性能不正确的是
A.螺栓材料的抗拉强度800MPa
B.螺栓材料的扈腋强度800MPa
C.螺栓材料的屈服强度640MPa
D.螺栓材料的屈强比为0.8
正确答案是B
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