three-lip keyway cutter

例句：

1. 1. This tool is ideal for cutting complex shapes in metal.
   这种工具非常适合在金属中切割复杂的形状。
2. 2. The engineer used a three-lobe keyway cutter to remove the damaged part of the machine.
   工程师使用一个三瓣键槽铣刀来去除机器损坏的部分。
3. 3. The three-lobe keyway cutter was designed specifically for this type of machining.
   这个三瓣键槽铣刀是专门为这种加工设计的。