{HEAD ~ The knife} has {TAIL ~ a leaf spring portion} directly connected to the eccentric member, fatigue failure of the leaf spring portion of the blade is inhibited by antivibration stops and by a varying cross section, a simple sharpener mechanism sharpens the blade on either one or both side faces, and a roller guide restrains the lower portion of the blade to the vertical axis with minimum frictional loss 
has
{ HEAD ~ The knife } has { TAIL ~ a leaf spring portion } directly connected to the eccentric member , fatigue failure of the leaf spring portion of the blade is inhibited by antivibration stops and by a varying cross section , a simple sharpener mechanism sharpens the blade on either one or both side faces , and a roller guide restrains the lower portion of the blade to the vertical axis with minimum frictional loss
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 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