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 heating projects, construction work; development, sale of computer hardware and software; construction of pressure containers, pressure pipelines, construction, maintenance, maintenance services (in accordance with the state limits on the operation of effective facilities); installation of gas-resistant refuelling devices, gas-res, gas gas-recycling equipment, gas-recycling equipment for the sale of natural gas and gas-riching facilities; installation and upgrading of equipment for the transport of licensed projects (for which approval is required by law and approval by the relevant authorities is required to carry out operations) production of special equipment; design of special equipment; production of hazardous chemical packagings and containers; technical advisory service on artificial smart public service platforms; integration of application systems in the artificial intelligence industry; sale of specialized equipment (for which approval is required by law and approval by the relevant sector is required to carry out operations) general projects: advertising, agent; advertising; sale of specialized equipment; development of technology for the networking of materials; technical services for the networking of materials; marketing of material networking equipment; marketing of industrial internet data services; integration of information systems; internet data services; development of artificial smart applications; technical advisory service on artificial smart public service platforms; integrated services for the application of the artificial intelligence industry; sale of smart machines; sale of solar energy technology services; wind power technology services; sale of wind generators and parts; sale of new energy-for-trangerage electrical equipment; provision of legally-based computer-based electronic equipment for the construction of robotic machines industry; and for the construction of