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