Manufacturing of industrial control computers and systems; manufacturing of electronic special materials; manufacturing of other electronic components; manufacturing of electronic components; manufacturing of computer hardware and software and peripheral equipment; computer system services; manufacturing of packaging special equipment; manufacturing of special equipment (excluding professionally licensed equipment manufacturing); manufacturing of electronic special equipment; manufacturing of electrical machinery special equipment; manufacturing of printing special equipment; manufacturing of daily chemical special equipment; manufacturing of weighing instruments; sales of weighing instruments; sales of special instruments and meters for environmental monitoring; manufacturing of special instruments and meters for environmental monitoring; manufacturing of equipment for environmental protection; manufacturing of other general instruments; repair of general equipment; manufacturing of electronic measuring instruments; sales of electronic measuring instruments; domestic trade agency; trade brokerage; sales of electronic products; sales and manufacturing of electronic components and mechanical and electrical assembly equipment; manufacturing of power electronic components; wholesale of electronic components; sales of electronic special equipment; sales of electronic special materials; sales of electronic components and mechanical and electrical assembly equipment; sales of power electronic components; retail of electronic components; sales of electronic special equipment; sales of electronic special materials; sales of power electronic components; repair of special equipment; repair of instruments and meters; research and development, technical research and development, technical consultation, technical exchange, technology transfer, technology promotion; import and export of goods; import and export of technology; agency for import and export; management of import and export of state-owned trade goods