surface superfinishing

例句：

1. 1. The engineer used a superfinishing machine to polish the metal surface.
   工程师使用一台超精加工机器来抛光金属表面。
2. 2. The car was given an extra finishing touch with a new paint job.
   汽车经过一次额外的抛光处理，外观焕然一新。
3. 3. The company has invested in a state-of-the-art finishing facility to improve product quality.
   该公司投资了一家最先进的抛光设施，以提高产品质量。