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