Manufacturing of railway-specific measuring or testing instruments; manufacturing of electronic components and electromechanical component equipment; manufacturing of industrial automatic control system devices; manufacturing of mechanical and electrical equipment; manufacturing of power distribution switchgear equipment; manufacturing of electrical instrumentation; manufacturing of electronic measuring instruments; manufacturing of railway rolling stock parts; manufacturing of metal processing machinery; research and development of power distribution switchgear equipment; research and development of motors and their control systems; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; research and development of intelligent robots; sales of railway-specific measuring or testing instruments; sales of mechanical and electrical equipment; sales of advanced power electronic devices; sales of electronic measuring instruments; sales of electronic products; sales of electronic components and electromechanical component equipment; repair of electrical equipment; installation and maintenance of industrial robots; repair of general equipment.