In {TAIL ~ accordance} with the teachings of the present invention, {HEAD ~ adjustable ring structure} is provided wherein a ring shank is hinged to define first and second arcuate elements having an aperture therebetween 
In
In { TAIL ~ accordance } with the teachings of the present invention , { HEAD ~ adjustable ring structure } is provided wherein a ring shank is hinged to define first and second arcuate elements having an aperture therebetween
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