The research on the principle and the relation between the time and thickness, structure, property of plating coat is given.
研究了施镀时间与镀层增重、镀层厚度、镀层组织和性能的关系，并探讨了化学镀镍的机理。
Surface cleaning quality of CO2 shielding welding wire good or not is directly relative to plating coat quality of welding wire.
CO2气保焊丝表面清洗质量的好坏直接关系到焊丝镀层的质量。
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