• 2022-07-28
    ‍[img=488x302]1802d4849d2db39.jpg[/img]‌‍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]1802d484a57dd72.png[/img]
    B: [img=185x22]1802d484ad9be97.png[/img]
    C: [img=185x22]1802d484b6424f1.png[/img]
    D: [img=185x22]1802d484bf36913.png[/img]