exhaust restrictor

例句：

1. 1. The exhaust restrictor is designed to prevent the engine from overheating.
   排气限制器的设计目的是防止发动机过热。
2. 2. The exhaust system needs regular cleaning to ensure optimal performance.
   排气系统需要定期清理，以确保最佳性能。
3. 3. The exhaust restrictor was replaced after a few months of use due to wear and tear.
   使用几个月后，由于磨损，排气限制器被更换了。