smooth grinding

例句：

1. 1. The engineer used a smooth grinding machine to cut the metal.
   工程师使用一台平滑的磨床来切割金属。
2. 2.The smooth grinding process is crucial for the quality of the final product.
   平滑的研磨过程对于最终产品的质量至关重要。
3. 3.The smooth grinding technique helps to achieve a consistent finish on the surface of the material.
   平滑的研磨技术有助于在材料表面达到一致的表面效果。