General items: Sales of mechanical equipment; Sales of communication equipment; General mechanical equipment installation services; Maintenance of electronic and mechanical equipment (excluding special equipment); Sales of electromechanical equipment; Sales of metal materials; Research and development of mechanical equipment; Manufacturing of paper and cardboard containers; Sales of paper products; Manufacturing of paper products; Packaging services; Sales of plastic products; Manufacturing of plastic products; Sales of wooden containers; Manufacturing of wooden containers; Sales of industrial control computers and systems; Manufacturing of general equipment (excluding special equipment manufacturing); Import and export of goods; Import and export agency; Import and export of technology; Industrial engineering design services;