一方面孔径存在轻微的变形，另一方面电镀后挂钩接触部位镀层偏高或者产生轻

On the one hand there is a slight deformation of the aperture, on the other hand in contact with the coating after plating hook slight burrs or high (contact position hook - schematic mouth current is too large, the effect of strong adsorption of the coating, the coating than other parts of the uneven thickness, hook as follows:

On the one hand, there is a slight deformation of the aperture, on the other hand, electroplating hook contact site coating is high or produces a slight burr (hook contact position - the mouth current is too large, the coating adsorption effect is strong, thicker than the other parts of the coating, hook schematic is as follows:

On the one hand, there is slight deformation of the hole diameter, on the other hand, the coating on the contact part of the hook is too high or there is slight burr (the contact position of the hook - the current at the mouth is too large, the coating has strong adsorption effect, and the coating on other parts is too thick, the hook diagram is as follows:<br>