General projects: Research and development of valves and cocks; Manufacturing of ordinary valves and cocks (excluding manufacturing of special equipment): Sales of valves and cocks; Manufacturing of general equipment (excluding manufacturing of special equipment); Manufacturing of non-ferrous metal alloys; Manufacturing of pumps and vacuum equipment; Mechanical equipment Research and development; Technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; Sales of electrical equipment, sales of pumps and vacuum equipment: General equipment repair; Sales of mechanical equipment; Leasing of mechanical equipment, Mechanical and electrical equipment sales: Industrial automatic control system device sales: Firefighting equipment sales: Power electronic components sales; Electronic special equipment sales: Instrument and meter sales: Instrument and meter repair; Wire and cable management; Hardware product retail: Hardware product wholesale packaging materials Sales of products and products; Housing leasing; Repair of special equipment; Sales of intelligent instruments and meters; Import and export of goods. (Except for projects that require approval according to law, business activities can be carried out independently with a business license and in accordance with the law)