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