Research and development, production, sales, and technical services of oil machinery and comprehensive utilization equipment, automation control equipment. sales of electromechanical products (excluding sedans), instruments and meters, water treatment equipment, installation, sales, and technical services of high and low voltage distribution system equipment, design, research and development, production, installation, and technical services of network monitoring and control systems; Sales and technical services of computer software and hardware, office automation equipment; Computer software development and testing; Checking, testing, and detection of instruments, equipment and materials; Model design and production; Research and development, production, sales, and technical services of testing equipment for pressure, temperature, flow, acoustics, and electromagnetism; Research and development, production, installation, sales, and technical services of industrial automation control systems; Import and export operations of goods and technologies (excluding goods and technologies that are restricted, prohibited, and require approval for import and export by the state). (Projects that require approval according to law can only be operated with the approval of relevant departments)