prov:value
| - The membrane is, for example, a porous polymer, e.g. polytetrafluroethylene, polyvinylidene fluoride, polyester, polyamide, polycarbonate, polypropylene, polymethylmethacrylate, polymethacrylate, polysulfone, or polystyrene, coated with Hercules R-4308, a polyamido-polyamine epichlorohydrin resin.
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