General items: sales of CNC machine tools; sales of machine tool functional parts and accessories; manufacturing of machine tool functional parts and accessories; sales of industrial robots; installation and maintenance of industrial robots; technical services, technology development, technical consultation, technical exchanges, technology transfer, and technology promotion; sales of lubricants; sales of electronic components and electromechanical component equipment; sales of instruments and meters; domestic trade agents; leasing of mechanical equipment; installation of industrial automatic control systems