| http://www.w3.org/ns/prov#value | - One skilled in the art will readily appreciate that a variety of membranes may be used, including but not limited to synthetic and natural woven, knit, and non woven textiles, leathers, plastics, vinyl films, reinforced vinyl films, textile and metal and plastic meshes and screens, polypropylene films, Mylar films, and urethane films and other polymer films and membranes.
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