Petroleum equipment and spare parts, natural gas equipment and spare parts, pipeline materials and spare parts, electromechanical equipment and spare parts, hardware and electrical equipment, instruments and meters, cathodic protection anticorrosive and insulating materials, chemical raw materials and products(excluding hazardous chemical substances); Technical consultation and service for pipeline products, import and export service for commodities and technology. ( the project which is subject to approval according to the law, only can carry out business after approved by relevant department)