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