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