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