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