[ Metal treating; treatment of metal alloys; treatment of steels; all mechanical, thermomechanical or chemical transformations of the properties and characteristics of metals being treatment of metal; direct reduction of iron being treatment of metal; metal tempering; finishing metal surfaces; soldering; metal casting and metal anodizing; chromium plating; treatment of metal by agglomeration; electrolytic zinc plating; phosphatizing, namely, chemical treatment of steel; metal milling; tin-pla...