0 0 0 0 0 0 0 3810.90 Fluxes and other auxiliary preparations for soldering, brazing or welding; preparations of a kind used as cores or coatings for welding electrodes or rods (excl. soldering, brazing or welding powders and pastes consisting of metal and other materials, and welding electrodes or rods of base metals or metal carbides coated with fluxes) 5