Manufacturing of special equipment; installation, modification, and repair of special equipment. General items: Manufacturing of transformers, rectifiers, and inductors; manufacturing of general-purpose equipment (excluding special equipment); manufacturing of specialized equipment (excluding licensed specialized equipment); manufacturing of environmental monitoring specialized instruments; manufacturing of environmental protection specialized equipment; manufacturing of mechanical and electrical equipment; manufacturing of hardware products; manufacturing of electronic specialized equipment; research and development of motors and their control systems; manufacturing of digital video surveillance systems; manufacturing of metal forming machine tools; manufacturing of bearings; manufacturing of CNC machine tools; manufacturing of plastic processing specialized equipment; manufacturing of photovoltaic equipment and components; manufacturing of semiconductor device specialized equipment; manufacturing of communication equipment; manufacturing of power facility equipment; manufacturing of micro motors and components; manufacturing of packaging specialized equipment; manufacturing of generators and generator sets; manufacturing of power electronic components; manufacturing of electrical equipment; manufacturing of electronic components and electromechanical component equipment; manufacturing of motors; manufacturing of bearings, gears, and transmission components; manufacturing of gas compression machinery; manufacturing of electronic components; research and development of mechanical equipment; research and development of Internet of Things technology; research and development of intelligent robots; research and development of hardware products; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; software development; industrial design services; satellite remote sensing application system integration; sales of environmental monitoring specialized instruments; sales of environmental protection specialized equipment; sales of mechanical and electrical equipment; sales of electronic components and electromechanical component equipment; sales of packaging specialized equipment; sales of digital video surveillance systems; sales of gas compression machinery; wholesale of electronic components; retail of electronic components; sales of metal forming machine tools; sales of CNC machine tools; sales of plastic processing specialized equipment; sales of generators and generator sets; manufacturing of electric motors; sales of semiconductor device specialized equipment; sales of photovoltaic equipment and components; sales of electrical equipment; vacuum coating processing; sales of electrical equipment; sales of electronic specialized equipment; sales of intelligent robots; sales of micro motors and components; manufacturing of electrical accessories; sales of electrical accessories; sales of power electronic components; wholesale of hardware products; retail of hardware products; import and export of goods; import and export of technologies; import and export agency; repair of electrical equipment; repair of general-purpose equipment; road freight transportation of ordinary trucks with a total mass of 4.5 tons or less (excluding network freight and dangerous goods).