| http://www.w3.org/ns/prov#value | - FIG. 6 is a bottom, left and front perspective view of a second embodiment of the present invention, similar to the FIG. 1 embodiment, showing a floor engaging base frame with side rails having channel tracks and four corner posts or legs, a carriage mounted on the floor engaging base frame for longitudinal sliding motion and an articulating upper frame mounted on the carriage,
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