wheel nut

例句：

1. 1. The car's engine is running smoothly because the wheelnuts are tightened properly.
   汽车发动机运行平稳，因为轮子螺母拧紧了。
2. 2. The mechanic replaced the wheel nuts onthe bicycle to fix the flat tire.
   自行车的轮胎爆了，于是修车工更换了轮子螺母。
3. 3. The engineerchecked the wheel nuts before starting the newproject.
   工程师在开始新项目前检查了轮子螺母。