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Winocean has nearly 10 years'experience in the research and development of perfluorinated ion exchange membranes ,our main products are Perfluorosulfonic Acid membranes ,PFSA ,Proton exchange Membranes ,Chlor Alkali Membrane ,Pem Electrolyzer ,Hydrogen Fuel Cell ,we also resell nafion dupont N112 ,115,117,211,212 ,2030,2050 ,flemion membrane .