{HEAD ~ The cross sectional area} of {TAIL ~ the head} 16 is slightly larger than that of the shank 14 
of
{ HEAD ~ The cross sectional area } of { TAIL ~ the head } 16 is slightly larger than that of the shank 14
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH