{HEAD ~ Each} of the longitudinal surfaces 1 b, 1 c extends upwardly into {TAIL ~ a crest} 30, which defines the highest level of the cutting insert portion with height h above the neutral plane P 
extends upwardly into
{ HEAD ~ Each } of the longitudinal surfaces 1 b , 1 c extends upwardly into { TAIL ~ a crest } 30 , which defines the highest level of the cutting insert portion with height h above the neutral plane P
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH