| http://www.w3.org/ns/prov#value | - Examples of such useful atypical backing materials include open-weave cloth, knitted fabrics, porous cloth, loop material (general referred to as Velcro??? type materials), untreated paper, porous polymeric films, opened or closed celled foams (for example, polyurethane foams), nonwovens, spun-fibers, combinations thereof and any other material now known or may be known that is ordinarily excluded
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