| http://www.w3.org/ns/prov#value | - first panel have perforations therein; means tending to maintain said first core in its expanded configuration so that it will anisotropically flex to stabilize and spread any load applied thereto by a user, and including a first facing sheet bonded to said first face and a second facing sheet bonded to said second face, at least one of said first and second facing sheets being perforated, said f
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