| http://www.w3.org/ns/prov#value | - A porous polymeric flat plate containing many pores, which pores consist of continuous open cells (the term continuous open cells" used herein means those which pass through the plate, often called pores"), such as a cellulose acetate porous membrane, filter paper, a polyamide resin, a polyvinyl chloride resin, a cellulose ester such as nitrocellulose, cellulose acetate butyrate, cellulose propi
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