| http://www.w3.org/ns/prov#value | - The left and right guide means 16 and 17 which are mirror images of one another are each formed as a unit and comprise with reference to FIG. 2 and in particular to FIG. 4, a vertical support wall 22 secured as by screws 23 to the inside of the legs 18 and 19 of the table 10.
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