| http://www.w3.org/ns/prov#value | - Other embodiments can employ a circular configuration for holder 24 instead of rectangular; an entirely different design in shape or configuration such as will be possible with the use of plastics; the legs can be rigid or detachable, or adjustable as to height; and circular rods can be used for runners, guide rails or tracks, or other means which will occur to those skilled in the art upon readin
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