electric valve seat grinder

例句：

1. 1. This electric valve seat grinder is very useful for cleaning the valve seats of gas engines.
   这台电阀座研磨机对于清洗燃气发动机的阀座非常有用。
2. 2. The manufacturer claims that their electric valve seat grinder can effectively remove rust and dirt from the valve seats.
   制造商声称他们的电阀座研磨机能有效地从阀座上去除锈迹和污垢。
3. 3.The electric valve seat grinder is a great tool for mechanics to maintain the performance of gas engines.
   电阀座研磨机是机械师维护燃气发动机性能的好工具。