{TAIL ~ Flexible region} 228 is relieved with an axially extending series of {HEAD ~ circumferential slots} 266 
{ TAIL ~ Flexible region } 228 is relieved with an axially extending series of { HEAD ~ circumferential slots } 266
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH