FIG 3 shows {HEAD ~ a comparison} for {TAIL ~ the same compositions} processed by pressureless sintering and hot pressing 
for
FIG 3 shows { HEAD ~ a comparison } for { TAIL ~ the same compositions } processed by pressureless sintering and hot pressing
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH