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Welcome to visit Puyang Hengfeng Petrochemical Industry Co.,Ltd！
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  • C5/C9 Copolymerization Petro

  • C9 Hydrocarbon Resin

  • C5 hydrogenation petroleum r

  • C5 Hydrocarbon Resin Applied

  • C5 Hydrocarbon Resin Applied

  • C5 Hydrocarbon Resin Applied

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