1、This paper analysed the cold die forging technology of automotive epicyclic gears.
分析了汽車行星齒輪的冷模鍛工藝。

2、an outer gear that revolves about a central sun gear of an epicyclic train.
圍繞本輪列車的中心齒輪旋轉(zhuǎn)的外部齒輪。

3、an outer gear that revolves about a central sun gear of an epicyclic train
圍繞本輪列車的中心齒輪旋轉(zhuǎn)的外部齒輪。