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