Import and export operations of goods and technologies of their own and agency (except goods and technologies for which the state limits the operation of enterprises or prohibits import and export); construction works, construction works, installation works for chemical oil installations, installation works for mechanical equipment, municipal utility works, construction of steel structures and related products, design of anti-water incendiary works, construction work; development, sale of computer hardware and software, manufacture, sale, repair, adaptation and maintenance of electrical equipment, construction of electrical equipment and equipment for the transport of natural gas, upgrading of electrical equipment and equipment for the transport of natural gas; construction works, construction works, installation works for chemical oil pipelines, installation works for electrical equipment, municipal utility works, construction works for steel structures, design of anti-water heatin...