你们的车都特别好，其中的一辆跑了80个小时都仍未进行过大的维修，我们只更换过变速箱里第三档的一个主动齿轮。

Otherwise, they have bikes worked well, one has now gone 80 hours without major repairs, we have only had to change third-place drive in the gearbox.

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介绍了汽车变速箱中的一个关键零部件—双联主动齿轮的冷态镦粗、挤压及冲孔的复合成型工艺。

This paper introduces cold heading and combined forming process of extrusion and punching for gear cluster, a key part of automotive gearbox.

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