NT high purity rosin, rosin special electronic welding, soldering rosin NT high purity rosin, rosin special electronic welding, soldering rosinBrand: NTCarton packaging Rosin is ... point), its dark red brown color, mainly used in electronic circuits welding flux, mainly used in instruments in to rub the ... wetting help weldment. NT high purity rosin, rosin special electronic welding, soldering rosin