https://hengrong-water-treat.en.made-in-china.com/product/QfuRwFlMADVj/China-PP-Membrane-Micro-Pore-Folded-Filter-Hydrophilic-Tetrafluoroethene.html
PP Membrane Micro-Pore Folded Filter Hydrophilic Tetrafluoroethene - Food-Grade Filter Cartridge...
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https://pubchem.ncbi.nlm.nih.gov/compound/1-Propene_-1_1_2_3_3_3-hexafluoro-_-polymer-with-1_1-difluoroethene-and-tetrafluoroethene
1-Propene, 1,1,2,3,3,3-hexafluoro-, polymer with 1,1-difluoroethene and tetrafluoroethene - PubChem
1-Propene, 1,1,2,3,3,3-hexafluoro-, polymer with 1,1-difluoroethene and tetrafluoroethene chemical information summary.