Angthong-A small magnetic polishing machine with too few polishing needles may result in defects such as poor polishing effect and uneven effect. For newly prepared magnetic polishing needles, it should be noted not to have too many; If the content of magnetic polishing needles reaches a certain equilibrium level, the polishing effect will be better. Once the workpiece exceeds the set time and still cannot achieve satisfactory brightness, it is usually necessary to adjust the polishing needle or adjust the ratio directly related to the concentration of the grinding fluid