chain wheel

例句：

1. 1. The engineer designed a new chain wheel for the machine.
   工程师为机器设计了一个新的链条轮。
2. 2. The old car had a worn-out chain wheel that needed to be replaced.
   旧车有一个磨损的链条轮，需要更换。
3. 3. The train uses chain wheels to move its heavy load.
   火车使用链条轮来移动其沉重的货物。