Explanatory notes
… is usually composed of a tube or sometimes of a spirally wrapped strip. Wire, rods, tubes, plates, electrodes, etc., … metal not coated or cored with flux material are excluded (Chapters 72 to 76 and 78 to 81) . The materials used for … heading does not cover wire and rods of cored solder where, apart from flux material , the solder consists of an alloy …