The tungsten carbide can be essentially {TAIL ~ any type} as long as {HEAD ~ the particle size} is less than about 1 micrometer in mean diameter 
The tungsten carbide can be essentially { TAIL ~ any type } as long as { HEAD ~ the particle size } is less than about 1 micrometer in mean diameter
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH