• 2022-06-28
    螺栓、螺母和垫圈的近似画法中,螺栓伸出螺母的长度,一般可取()。
    A: (0.1~0.2)d
    B: (0.2~0.3)d
    C: (0.3~0.4)d
    D: (0.4~0.5)d