Preferably {HEAD ~ the blade} is urged against {TAIL ~ the web} with a force not exceeding 0.20 kgf per centimeter width of web 
is urged against
Preferably { HEAD ~ the blade } is urged against { TAIL ~ the web } with a force not exceeding 0.20 kgf per centimeter width of web
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH