{HEAD ~ The inserts} are cut at {TAIL ~ appropriate angles} as shown in FIG 4 so that inserts 48 and 50 have a 67.5° end cuts 
are cut at
{ HEAD ~ The inserts } are cut at { TAIL ~ appropriate angles } as shown in FIG 4 so that inserts 48 and 50 have a 67.5 ° end cuts
HEAD HEAD HEAD HEAD HEAD HEAD 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