The force transmission or transport device 7, wherein {HEAD ~ the friction clutch} comprises {TAIL ~ a pair} of friction wheels  
comprises
The force transmission or transport device 7 , wherein { HEAD ~ the friction clutch } comprises { TAIL ~ a pair } of friction wheels
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH