Manufacturing of instruments and meters; sales of instruments and meters; sales of intelligent instruments and meters; manufacturing of intelligent instruments and meters; manufacturing of supply instruments and meters; sales of supply instruments and meters; repair of instruments and meters; software development; software sales; software outsourcing services; technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion; manufacturing of general equipment (excluding special equipment); manufacturing of electrical signal equipment devices; sales of electrical signal equipment devices; installation services for general mechanical equipment; import and export of technologies; import and export of goods; residential housing leasing; non-residential real estate leasing; road freight transport of general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and hazardous goods).