sintered piston ring

例句：

1. 1.The engine was damaged due to the worn-out sintered piston ring.
   由于磨损的烧结活塞环，发动机受损了。
2. 2. The technician replaced the sintered piston ring with a new one.
   技术员用一个新的烧结活塞环替换了旧的。
3. 3. The manufacturer recommends replacing the sintered piston ring after every 500 hours of use.
   制造商建议每使用500小时更换一次烧结活塞环。