The geometrical irregularity of cutting edge due to chipping is a significant factor that affects the quality of surface finish in precision machining. The single crystal diamond cutting tools are widely used for precision machining of aluminum and copper. The reason of the use of single crystal ma的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

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有欠妥之处的几何切割边缘由于切削是一个重要的因素,它会影响质量的表面抛光的精密加工。单晶金刚石切割工具的广泛的用于精密加工的铝和铜。的原因是使用的单晶材料的平滑度,保证切割边缘。