| http://www.w3.org/ns/prov#value | - The spherical-shaped head portion 54 further defines a number of annular grooves or ridges 62 formed along the proximal portion of the head portion 54 to facilitate locking engagement of the spherical shaped head portion 54 with an intermediate member such as, for example, a crown member or other types and configurations or locking members that would occur to one of skill in the art, such that the
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