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