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"Porex Filtration Division\u2019s cross-flow Tubular Membrane Module features 61 \u00BD-inch diameter tubes in a polyvinylidene fluoride (PVDF) membrane that is anchored or chemically fused to a sintered porous plastic substrate tube."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/products/porex-filtration-tubular-membrane-system-offers-cross-flow-filtration>