| http://www.w3.org/ns/prov#value | - In one embodiment of the present invention, not particularly seen in the drawings, the hose connections and tubes 11 and 12 are connected with each double chambers or inflatable members 2 of each support element 1 such that each double chamber or inflatable member 2 of support element 1 is part of a different chamber system which does not communicate with any other chamber system or systems.
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