A change gear system 3, wherein {TAIL ~ the rotating frame} is attached to {HEAD ~ the stationary member} by means of a one way engagement clutch so that it is rotated only in one direction 
A change gear system 3 , wherein { TAIL ~ the rotating frame } is attached to { HEAD ~ the stationary member } by means of a one way engagement clutch so that it is rotated only in one direction
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH