FIG 3 further illustrates {TAIL ~ the provision} of {HEAD ~ a notch} 90 formed by shoulders on the adjacent facing circumferential ends of the segments 80 
FIG 3 further illustrates { TAIL ~ the provision } of { HEAD ~ a notch } 90 formed by shoulders on the adjacent facing circumferential ends of the segments 80
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH