backed-off milling cutter

例句：

1. 1.This backed-off milling cutter is designed to be more precise and efficient.
   这种后退的铣刀设计得更加精准和高效。
2. 2. The engineer used a backed-off milling cutter to create a smooth surface.
   工程师使用一个后退的铣刀来创造一个光滑的表面。
3. 3.The backed-off milling cutter was the key to achieving high precision in cutting.
   后退的铣刀是实现高切割精度的关键。