Sale: Valves and accessories, transmission, Complete sets of equipment and accessories, Pipes and fittings, Environmental protection equipment, electrical components, Electric wear-resistant materials, Metal materials( In addition to national special regulations), Mechanical and electrical products( Except for passenger cars with less than nine seats), water pump, Instruments, Building Materials( Except for hazardous chemicals); Self-operated and agency import and export business of general business items, commodities and technologies, The import and export of licensed items and technologies must obtain special approval from the state before they can be operated.( Except for goods and technologies that the state restricts companies from operating or prohibits import and export)。