Alternately, the ramp 111 can be formed as {HEAD ~ part} of {TAIL ~ the rotatable member} 40 
of
Alternately , the ramp 111 can be formed as { HEAD ~ part } of { TAIL ~ the rotatable member } 40
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH