General projects: technical services, technology development, technology consulting, technology exchange, technology transfer, technology promotion; Sales of mechanical equipment; Sales of instruments and meters; Sales of pumps and vacuum equipment; Sales of mechanical and electrical equipment; Sales of pipeline transportation equipment; Sales of valves and plugs; Sales of specialized equipment for refining and chemical production; Sales of seals; Sales of mechanical parts and components; Sales of mining machinery; Installation services for ordinary mechanical equipment; Sales of metal materials; Sales of specialized equipment for oil drilling and production; Sales of gas compression machinery; Sales of firefighting equipment; Information consulting services (excluding licensed information consulting services); Import and export of goods; Technology import and export; Import and export agency; Conference and exhibition services. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law)