valve seat insert

例句：

1. 1. The engineer used a special tool to insert the valve seat into the cylinder.
   工程师使用特殊工具将阀门座插入到气缸中。
2. 2. The valve seat insert is designed to prevent leakage during operation.
   阀门座插入件设计用来在操作过程中防止泄漏。
3. 3. The valve seat insert was made from high-quality materials to ensure longevity and reliability.
   阀门座插入件由高质量材料制成，以确保其持久性和可靠性。