Design of special equipment; filling of mobile pressure vessels/gas cylinders; manufacturing of road motor vehicles; installation, modification and repair of special equipment; manufacturing of special equipment; production of hazardous chemical packaging and containers. General items: manufacturing of specialized equipment for oil refining and chemical production; manufacturing of general equipment (excluding special equipment); manufacturing of metal processing machinery; manufacturing of containers; spray coating processing; sales of station hydrogen refueling and hydrogen storage facilities; metal surface treatment and heat treatment processing; sales of specialized equipment for oil refining and chemical production; manufacturing of gas, liquid separation and purification equipment; manufacturing of pumps and vacuum equipment; sales of mechanical and electrical equipment; manufacturing of specialized equipment (excluding licensed specialized equipment); sales of gas, liquid separation and purification equipment; sales of specialized equipment for petroleum drilling; manufacturing of metal packaging containers and materials; sales of metal products; manufacturing of auto parts and accessories; electrophoretic coating processing; manufacturing of metal structures; sales of special equipment; technical services, technology development, technical consultation, technical exchange, technology transfer, and technology promotion; industrial engineering design services; sales of new automobiles; motor vehicle repair and maintenance.