{HEAD ~ The method} 1 wherein {TAIL ~ said solid particulate material} is selected from the group of sand, carbon, graphite, silicon carbide, magnesite, and dolomite 
{ HEAD ~ The method } 1 wherein { TAIL ~ said solid particulate material } is selected from the group of sand , carbon , graphite , silicon carbide , magnesite , and dolomite
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH