Air is conveyed onto {HEAD ~ the engraving work surface} to cool {TAIL ~ the workpiece} and reduce the possibility of fire 
Air is conveyed onto { HEAD ~ the engraving work surface } to cool { TAIL ~ the workpiece } and reduce the possibility of fire
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH