ring-shaped valve seats

例句：

1. 1.The ring-shaped valve seats are designed to prevent leaks and ensure smooth operation of the engine.
   环形阀门座的设计旨在防止泄漏并确保发动机的顺畅运行。
2. 2.The engineer carefully inspected the ring-shaped valve seats before installing the new parts.
   工程师在安装新部件之前仔细检查了环形阀门座。
3. 3. The ring-shaped valve seats are made of high-quality materials to ensure longevity and durability.
   环形阀门座由高质量的材料制成，以确保其持久性和耐用性。