| http://www.w3.org/ns/prov#value | - a locking assembly being configured to lock said panel in one of a plurality of angled relationships with respect to said top and bottom walls, said locking assembly including a ball detent mounted in said top wall and being biased toward said panel, said panel having a plurality of indentations therein, said ball detent being removably positionable in one of said indentations, each of said indent
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