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  "abstract": "A method for manufacturing a soldered product by soldering a solder object portion, including: a solder supplying step that causes a cylindrical soldering iron having a through hole to contact with the solder object portion to supply a thread solder piece to the solder object portion from the through hole; a heating step that heats the thread solder piece with the cylindrical soldering iron and causes to melt the thread solder piece at the solder object portion; and a curing step that cures a melting object of the thread solder piece to solder the solder object portion. The thread solder piece is composed of a core containing a flux and a coating member containing a solder alloy that covers the core. The flux has a rosin having an acid value which is substantially as a main component thereof.",
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  "title": "Method for manufacturing soldered products",
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