(i) technology and equipment; sales of electrical equipment; sale of electrical machinery; sale of electrical equipment; repair of electrical equipment; repair of electrical equipment; construction of machinery; construction of machinery; production of metal; sale of metal metal; sale of metal tools; sale of machinery and accessories; sale of metal-forming machinery; sale of control machinery; sale of metals and other metal products; repair of hardware; installation of gas-compressed machinery; maintenance of machinery and components; sale of electrical machinery; production of machinery equipment; repair of electrical equipment; repair of electrical equipment; construction of gas machinery; development of machinery; development of machinery; development of machinery and equipment; production of machinery; production of machinery and equipment; production of metals; sale of metal metal; sale of metals; sale of metal-laying equipment; sale of equipment; sale of metal-laying equipment; supply of equipment; supply of equipment; production of electrical equipment; production of electrical equipment; production of electrical equipment; production of electrical equipment; production of equipment; production of electrical equipment; production of equipment; maintenance of equipment; and management of electrical equipment;