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