General Items: Sales of special equipment; sales of mechanical equipment; sales of drying furnaces, melting furnaces and electric furnaces; sales of pumps and vacuum equipment; sales of mechanical parts and components; sales of metal products; processing of mechanical parts and components; sales of special environmental protection equipment; sales of metal structures; sales of valves and cocks; sales of blowers and fans; general equipment repair; technical services, technical development, technical consultation, technical exchange, technology transfer, and technology promotion (Except for projects that must be approved in accordance with the law, independently carry out business activities in accordance with the law with a business license).

Licensed Items: Installation, transformation and repair of special equipment; installation and maintenance of gas-fired combustion appliances (Projects that must be approved in accordance with the law may only carry out business activities after approval by the relevant authorities. The specific business projects shall be subject to the approval documents or permits issued by the relevant authorities).