| http://www.w3.org/ns/prov#value | - wherein at least said central portion of said strip is made of a material having an air porosity of at least 50 cubic ft./min./sq. ft. and is selected from the group consisting of a mesh and a gauze, said material including at least one of a plurality of longitudinally extending yarns, a plurality of transversely extending yarns, and a plurality of diagonally extending yarns.
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