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Jiangsu Ruigong Petroleum Machinery CO.,LTD located in Nanjing,Specialized in petroleum machinery,production and manufacturing,focus itself on researching & developing ,manufacturing,sales and services.Our products cover in many fields,such as oil(gas) christmas tree,slab gate valve,expanding valve,mud valve,adjusting valve,6A ball valve,casing head,tubing head,hanger,casing spool,tubing spool,nipple,flange,christmas tree cap and other wellhead spare parts. Advanced machining center and CNC lathes to ensure the precision of products,complete sets of testing equipment and advanced detection technology to ensure the good performance of the product,perfect quality management system to improve the fine quality of the product. Company uphold honesty,quality as the source,customer first business philosophy,to provide quality products and service for the customers,warmly welcome customers to cooperate with our company ,to create a better future.