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