| http://www.w3.org/ns/prov#value | - The respective mounting ring sections 139 and 146 define retainer openings 162 and annular internal support shoulders 164 that are engaged by the heads of the retainer screws 160 and thus enable the retainer screws to tighten the upper portions of the mounting ring sections 139 and 146 together and establish fictional retention of the tubular section of the optical sighting device or other object
|
