• 2022-10-29
    螺栓的机械性能等级为8.8,说明( )?
    A: 螺栓的拉伸强度大于800Mpa,屈服强度大于640Mpa
    B: 螺栓的屈服强度大于800Mpa,拉伸强度大于640Mpa
    C: 螺栓的屈服强度大于800Mpa,拉伸强度大于800Mpa
    D: 螺栓的屈服强度大于640Mpa,拉伸强度大于640Mpa