epicycle reduction gear train

例句：

1. 1.The engineer designed the epicycle reduction gear train to improve efficiency.
   工程师设计了行星轮减速器以提高效率。
2. 2. The new model of the car has a more advanced epicycle reduction gear train.
   这款新车采用了更先进的行星轮减速器。
3. 3.The construction of the transmission system in the machine is based on the epicycle reduction gear train.
   机器的传动系统建设基于行星轮减速器。