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When using a soldering iron, the temperature of the soldering iron is too low to melt the solder, or the solder has not completely melted into a bad looking, unreliable look. Too high and the soldering iron will \"burn\" (although the temperature is very high, but not dip in tin). In addition, also want to control the welding time, the electric soldering iron stay time is too short, solder is not easy to completely melt, good contact, the formation of\"Virtual welding\", and the welding time is too long and easy to damage the components, or make printed circuit boardCopper foilThe cock. Generally one or two seconds to weld a good spot, if not completed, would rather wait a while to weld again. Welding iron can not move, should first choose the position of the solder joint, and then use the soldering iron head lined tin surface to contact the solder joint.
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