Obviously, the introduction of {TAIL ~ lubricant} provides the added advantage of carrying {HEAD ~ heat} from the knife and cooling the knife , thereby enabling still higher speed operation 
Obviously , the introduction of { TAIL ~ lubricant } provides the added advantage of carrying { HEAD ~ heat } from the knife and cooling the knife , thereby enabling still higher speed operation
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH