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