flat grinder

例句：

1. 1. This flat grinder is very efficient at grinding metal.
   这台平磨机在磨金属方面非常高效。
2. 2.The flat grinder is used to smooth the surface of a material before it is used in production.
   平磨机用于将材料的表面平滑化，以便在生产中使用。
3. 3.Flat grinders are commonly used in industries that require high precision grinding, such as manufacturing and engineering.
   平磨机常用于需要高精度研磨的工业，如制造和工程领域。