copy grinding是什么意思

用法例句

An experimental system,based on the magnetic field theory and the ultrasonic vibrancy theory,was designed,and the experiments show that the average roughness value of the surface by compound-finishing.

以超声振动理论和磁场理论为基础设计了一套超声磁粒复合研磨实验系统,实验证明,在单纯磁粒研磨显示磨粒失效的情况下,超声磁粒复合研磨可以使表面粗糙度平均下降0。