{HEAD ~ More particularly, first and second arcuate members} 80 and 82 are cut away in {TAIL ~ precisely the same manner} described in connection with FIG 2 so that the peripheral portions thereof will accept the ring top 90 
are cut away in
{ HEAD ~ More particularly , first and second arcuate members } 80 and 82 are cut away in { TAIL ~ precisely the same manner } described in connection with FIG 2 so that the peripheral portions thereof will accept the ring top 90
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH