• 2022-07-25
    180380cce896cf1.jpg齿轮1和2的齿数分别为:
    A: [img=121x22]180380ccf0f577f.png[/img]
    B: [img=121x22]180380ccf9d3df2.png[/img]
    C: [img=121x22]180380cd0277e41.png[/img]
    D: [img=121x22]180380cd0ae6617.png[/img]