The braking elements comprise {TAIL ~ at least an elastic washer} for providing axially prestressed mutual contact of {HEAD ~ the friction surfaces} of the discs 
The braking elements comprise { TAIL ~ at least an elastic washer } for providing axially prestressed mutual contact of { HEAD ~ the friction surfaces } of the discs
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH