stepped gear wheel

例句：

1. 1. The stepped gear wheel on the car is a crucial part of its operation.
   汽车上的阶梯齿轮是其运行的关键部件。
2. 2. The engineer carefully adjusted the stepped gear wheel to ensure smooth operation.
   工程师仔细调整了阶梯齿轮以确保平稳运行。
3. 3. The stepped gear wheel in the transmission system helps to transfer power efficiently.
   传动系统中的阶梯齿轮有助于高效地传递动力。