Polytetrafluoroethylene (PTFE) mangrupakeun polimér tina tetrafluoroethylene (TFE), nu mangrupa bahan fluorine organik penting mibanda sipat diéléktrik alus teuing jeung koefisien gesekan low.Biasana dipaké salaku plastik rékayasa, bisa dijieun kana polytetrafluoroethylene tube, rod, pita, piring, pilem, ...
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