{TAIL ~ A cutter assembly} 8, wherein the thoriated tungsten comprises {HEAD ~ about 2% thorium dioxide} 
{ TAIL ~ A cutter assembly } 8 , wherein the thoriated tungsten comprises { HEAD ~ about 2 % thorium dioxide }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD