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