spiral fluted end mill

例句：

1. 1.The engineer used a spiral flute end mill to cut the metal sheet.
   工程师使用螺旋槽铣刀切割金属板材。
2. 2.The tool was designed for precision cutting in complex shapes.
   该工具设计用于精密切割复杂形状。
3. 3.The spiral flute end mill is an essential tool for machining difficult-to-cut materials.
   螺旋槽铣刀是加工难以切削材料的关键工具。