{HEAD ~ Flat surfaces} that result from the cutting are polished using {TAIL ~ an abrasive disc wheel} 
are polished using
{ HEAD ~ Flat surfaces } that result from the cutting are polished using { TAIL ~ an abrasive disc wheel }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL