cycloidal gear hob

例句：

1. 1. The engineer used a cycloidal gear hob to make the machine run more smoothly.
   工程师使用一个滚珠轴承使机器运行得更加平滑。
2. 2.The car's engine uses a cycloidal gear hob to convert the mechanical energy into electrical energy.
   汽车的发动机使用一个滚珠轴承将机械能转化为电能。
3. 3.The scientist designed a new cycloidal gear hob that could reduce friction and increase efficiency.
   科学家设计了一种新型的滚珠轴承，可以减少摩擦并提高效率。