该设备的索赔3，其中第一和第二轴进一步包括。
The device of claim 3, wherein said first and second shafts further comprise.
第一过渡轴通过轴齿轮与第二过渡轴的轴齿轮啮合；
The first transitional shaft is engaged with a second transition shaft through a gear shaft;
第一过渡轴通过轴齿轮与第二过渡轴的轴齿轮啮合；
The first transitional shaft is engaged with a second transition shaft through a gear shaft;
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