end mill gashing and radius grinder

例句：

1. 1.The end mill is essential for cutting intricateshapes in metal.
   端铣刀对于在金属中切割复杂形状至关重要。
2. 2. The radiusgrinder was used to smooth the surfaceof the workpiece.
   圆盘磨床被用来平滑工件的表面。
3. 3. Theengineer used the end millto cut a precise hole inthe material.
   工程师使用端铣刀在材料上切出一个精确的孔。