precision grinding

例句：

1. 1. The engineer used precision grinding to create a smooth surface.
   工程师使用精密研磨来制作一个光滑的表面。
2. 2. The precision grinding process is crucial for the quality of the machine parts.
   精密研磨过程对于机器零件的质量至关重要。
3. 3. The precision grinding equipment is highly sophisticated and requires professional operators.
   精密研磨设备非常先进，需要专业的操作员。