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