Camshafts play an important part in the valve train of engine, their accuracyoffinish can affect the unitary performance of engine.
凸轮轴是汽车发动机配气机构的一个非常重要的机械部件，它的加工精度直接影响到汽车发动机的整体性能。
2
Closed-die forging can produce components of greater complexity and accuracy, with a better surface finish than the more traditional methods not using closed dies.
闭式模锻能生产高度复杂和精确的零件，而且表面光洁度要比不用闭式锻模的更传统方法好。
3
The rough gear milling is the preceding working procedure offinish gear milling, which influences not only the machining efficiency of gear but also the final machining accuracy of tooth flank.