| http://www.w3.org/ns/prov#value | - Hinging swivel 162 is placed slightly below the positionof slot 97 so as to allow pivoting between the external junction support rail and the internal junction support rail.The foregoing description and drawings merely explain and illustrate the invention and the invention is not limited thereto, except in so far as the appended claims are so limited, as those skilled in the art who have the discl
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