two-lip end mill

例句：

1. 1.This tool is used for cutting complex shapes in metal.
   这种工具用于金属中切割复杂的形状。
2. 2. The engineer designed the machine with a two-lip end mill to increase efficiency.
   工程师设计了这台机器，使用双唇端铣刀来提高效率。
3. 3.The precision of the two-lip end mill is crucial for the quality of the workpiece.
   双唇端铣刀的精度对工件的质量至关重要。