尼克-北极星2020-01-08👍371 Feed, preparation, the aircraft confirmed that the hanging material, linked to a type of pre-processing, chemical degreasing, agents from the cold, alkaline degreasing, content, the proportion of each sub-6H1, the proportion of dollars, linked to pre-plating of the report dealing with detection, as required Standard adjustment, washing, water temperature, acid rust, the content of the mixture, rust acid, the anode electrolysis oil, oil off, current trough of low zinc cyanide, zinc oxide, a good perspective, titration analysis, composition analysis, Sodium cyanide, sodium hydroxide, Technology Inspection records table, brightener, consumption and post-processing