Manufacture of specialized equipment for oil refining and chemical production; sales of specialized equipment for oil refining and chemical production; sales of special equipment; leasing of special equipment; manufacture of general equipment (excluding special equipment); manufacture of gas, liquid separation and purification equipment; sales of gas, liquid separation and purification equipment; technical services, technology development, technical consultation, technical exchange, technology transfer, and technology promotion; manufacture of specialized equipment (excluding licensed specialized equipment); manufacture of environmental protection specialized equipment; repair of specialized equipment; sales of station-use hydrogen refueling and storage equipment; energy storage technical services; manufacture of automotive parts and accessories; manufacture of casting machinery; manufacture of metal processing machinery; metal cutting processing services; metal surface treatment and heat treatment processing; quenching processing; spray coating processing; manufacture of gas compression machinery. Licensed items: design of special equipment; installation, modification, and repair of special equipment; manufacture of special equipment; inspection and testing services; manufacture of road motor vehicles; production of dangerous chemical packaging and containers; construction engineering construction; construction engineering design; electrical installation services (excluding those subject to special access management measures as stipulated by national regulations).