{HEAD ~ The braking device} is moved forward by {TAIL ~ a shutter opening member} near the end of aperture opening by the shutter opening member, and is moved backward by the shutter closing member near the end of aperture closing 
is moved forward by
{ HEAD ~ The braking device } is moved forward by { TAIL ~ a shutter opening member } near the end of aperture opening by the shutter opening member , and is moved backward by the shutter closing member near the end of aperture closing
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH