{HEAD ~ A particularly preferred grinding medium} is a material commercially available under {TAIL ~ the name} YTZ Ceramic Beads, commercially available from S. E. Firestone Associates 
{ HEAD ~ A particularly preferred grinding medium } is a material commercially available under { TAIL ~ the name } YTZ Ceramic Beads , commercially available from S. E. Firestone Associates
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH