| http://www.w3.org/ns/prov#value | - As shown in FIG. 3, each electrical outlet module 36 may include a set of resilient tangs or buttons 44 on opposing sides thereof which may optionally additionally include barbs or other retaining structure, and provide snap-fit engagement with vertical upper flange 39 and vertical lower flange 41, as described below, to retain electrical outlet module 36 in any selected position along the length
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