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