{TAIL ~ further arcuate portions} continuously formed with {HEAD ~ said respective planar portions} and matched to a portion of the other arcuate portion of said elongated mating member, and 
{ TAIL ~ further arcuate portions } continuously formed with { HEAD ~ said respective planar portions } and matched to a portion of the other arcuate portion of said elongated mating member , and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH