40 Information and consultancy services in the field of the treatment of materials; material treatment services, namely, blacksmithing; abrasion, magnetization, silver-plating, soldering, coppersmithing, chromium plating, metal casting, cutting, gilding, tin-plating, stamping, millworking, galvanization, engraving, grinding, nickel plating, metal plating, metal polishing, welding, metal tempering; machining of metals, stamping services, precision stamping services; forging of metal goods to the order and specification of others, namely, hot, cold, semi-hot forging services on industrial parts, mechanical engineering parts for automobiles, military equipment, agricultural equipment, aeronautical industry, building, public works, railways, air conditioning, and the energy industry