40 Metal and metal alloy treating; metal and metal alloy treating, namely, stamping, pressing, hardening, forming, forging, machining, cutting and embossing; metal treating, namely, surface coating, build-up welding, laser build-up welding, plasma treatment of surfaces; treatment of metal parts to prevent corrosion; treatment of metals, metal surfaces, pipes and tubes by means of heat; applying protective coatings to metal by means of galvanization; application of wear-resistant coatings on metals, metal alloys, plastics, machine components and tools by means of physical and chemical vapor deposition; chrome coating; chrome plating; chrome electroplating; nickel coating; nickel plating; nickel electroplating