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