(e) construction of metal tools; construction of metal removal and welding equipment; manufacture of metal packagings and materials; manufacture of metal wires and their products; production of metal metal; production of metal metalworking equipment; construction of gas, air-conditioning equipment; sale of gas, liquid separation and pure equipment on behalf of legal persons; construction of metal fittings and windows; sale of metal fittings; construction of metalworking materials; manufacture of metal-cutting machinery; manufacture of metalworks; manufacture of metalworks; manufacture of metalworks and metals; production of metalworking materials; production of metalworks and products; production of metalworks and metals; production of metalworks and metals; production of metalworks and metals; production of metalworks and metalworks; production of metalworks and metalworks; production of metalworks and metalworks; production of equipment and equipment for the sale of electrical equipment and metal equipment; production of equipment and equipment for the sale of electrical equipment; production of equipment and equipment for the sale of metal; and production of equipment and equipment for the sale of electrical equipment; equipment and equipment for the sale of metals; and equipment for the sale of equipment for the production