[ Metal treating and all treatment of metal through mechanical, thermomechanical, thermomechanical or chemical transformation of the properties and characteristics of metals, namely, direct reduction of iron, metal tempering, finishing of metal surfaces, brazing, casting, anodizing, chromium plating, sintering, electrolytic zinc plating, phosphatizing, milling, shaping, tin-plating galvanizing, nickel plating, laminating, armor plating, cutting, polishing, magnetizing, plating, cupping, strip...