| http://www.w3.org/ns/prov#value | - e and spread any load applied thereto by a user of said apparatus and including a first facing sheet bonded to said first face and a second facing sheet bonded to said second face, said first facing sheet and said second facing sheet of said first panel being sealingly joined together about the perimeter of said core to provide a chamber enveloping said first core; and means fluid-communicatively
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