Polyvinyl fluoride pvf or ch 2 chf n is a polymer material mainly used in the flammability lowering coatings of airplane interiors and photovoltaic module backsheets. Ethyl fluoride or refrigerant gas r161 un2453 flammable gas ethyl fluoride or refrigerant gas r161 un2453 flammable gas 24981 14 4. Ethyl fluoride or refrigerant gas r161.
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