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Petrochemical Refining Manufacturers, Suppliers & Factory Directory Manufacturer/Factory Main Products: Petroleum Resin C9 , Petroleum Resin C5 , Hydrogenated Resins Mgmt. Certification: ISO 9001 City/Province: Qingdao, Shandong China Petroleum Resin C9 Manufacturers, Suppliers, Factory – Frandcom Petroleum Resin C9 ProductRead More