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the electrode has a clean metal surfaces floors in the area that will make the solder cleaning is to remove oxide film layer (Oxide) and stains from metal surface area will make the solderAll metal surface area to rest, but there are real CIA and reduce the strain on the surface of metal, metal solder solder flow. Spread on a metallic surface is good, and can help increase the wet conditions.(Oxidation) came in on a metallic surface area among the solder metal surface because the normal surface oxide film on the floor will have a story, and it will add more metal surface when the floor is the heat.Also, do not bring power and after the solder electrode that remains will be removed by using chemical solvents or solvent
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