{TAIL ~ The method} 1 in which {HEAD ~ said shape} has a length to wall thickness ratio of from 26 to 30 to 1 
in
{ TAIL ~ The method } 1 in which { HEAD ~ said shape } has a length to wall thickness ratio of from 26 to 30 to 1
TAIL TAIL TAIL TAIL TAIL TAIL OTH REL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH