METAL POWDER AND METAL GRITS, ESPECIALLY ALUMINUM POWDER AND ALUMINUM GRITS, MAGNESIUM POWDER AND MAGNESIUM GRITS; MIXTURES CONTAINING ALUMINUM AND OTHER METALS ADAPTED TO GENERATE HEAT WHEN BURNED, FOR PERFORMING WELDING AND SOLDERING OPERATIONS, AND WELD RODS

METAL WORKING HARDENING; SURFACE FINISHING OF METALS, ESPECIALLY ALUMINUM; REFINEMENT OF ALUMINUM PROFILES; COMBINING AND SCUMMING OF ALUMINUM PROFILES