In other words, the lubricant decreases the coefficient of friction on all faces of the knife and will increase {TAIL ~ 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 {HEAD ~ a significantly greater extent} 
In other words , the lubricant decreases the coefficient of friction on all faces of the knife and will increase { TAIL ~ 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 { HEAD ~ a significantly greater extent }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD