grinding fineness

例句：

1. 1.The machine has a very high grinding fineness, which ensures the precision of the workpiece.
   这台机器具有非常高的研磨细度，保证了工件的精准度。
2. 2.The engineer used a special grinding tool to achieve this level of grinding fineness.
   工程师使用特殊的研磨工具达到了这种研磨细度。
3. 3.The quality of the product is closely related to the grinding fineness of the machine tools.
   产品的质量与机床的研磨细度密切相关。