In other words, {HEAD ~ the lubricant} decreases {TAIL ~ the coefficient} of friction on all faces of the knife and will increase the knife life by significant percentages, but most importantly, the self sharpening effect will be enhanced because the friction on the upper surface will be reduced to a significantly greater extent 
decreases
In other words , { HEAD ~ the lubricant } decreases { TAIL ~ the coefficient } of friction on all faces of the knife and will increase the knife life by significant percentages , but most importantly , the self sharpening effect will be enhanced because the friction on the upper surface will be reduced to a significantly greater extent
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH