[Treatment of common metal and their alloys and steel; all kinds of metal treating and mechanical processing, thermomechanical processing or chemical processing of properties and characteristics of metals, their alloys and steel, namely, heat treatment and coating of metals, metal plating, direct reduction of iron, metal tempering, finishing of metal surfaces, soldering, metal casting, anodizing, chromium plating, metal sintering, electrogalvanizing, phosphatizing, metal milling, metal fabric...