• 2022-07-28
    1802d482b1dd325.jpg设传动满足条件r=(z1+z3)/n,且r=30,则齿数z1、z2及z3为:
    A: [img=194x22]1802d482ba38c50.png[/img]
    B: [img=185x22]1802d482c2e31dd.png[/img]
    C: [img=185x22]1802d482cb806ae.png[/img]
    D: [img=185x22]1802d482d3b3ca0.png[/img]