{TAIL ~ A preferred source} of {HEAD ~ submicron tungsten carbide} is that made according to U.S. Pat 
{ TAIL ~ A preferred source } of { HEAD ~ submicron tungsten carbide } is that made according to U.S. Pat
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH