| http://www.w3.org/ns/prov#value | - ongitudinal axis of said housing, said read head being fixedly mounted on said turret for movement therewith between two extreme positions, one generally normal and one generally parallel to the planar face of said housing, said read head projecting from said turret through said one opening in said housing and including a photo diode and lens means for optically reading bar codes on articles to be
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