| http://www.w3.org/ns/prov#value | - A mail box as defined in claim 10 in which said bushing is a cylindrical member with a projecting pin engaging the bottom of the recess in the box wall, said second detent being defined on said bushing by a radial slot merging at its inner end with a radial slot, the outer side of the detent being of reduced thickness and having its free end angled toward the stem of said flag, 7 whereby said firs
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