{TAIL ~ The reaming cutting edges} adjoin the at least one major cutting edge directly in {HEAD ~ the longitudinal direction} 
{ TAIL ~ The reaming cutting edges } adjoin the at least one major cutting edge directly in { HEAD ~ the longitudinal direction }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD