An object of the present invention is to provide {TAIL ~ a wave gear drive} which minimizes {HEAD ~ decrease} in efficiency at small speed change ratio 
An object of the present invention is to provide { TAIL ~ a wave gear drive } which minimizes { HEAD ~ decrease } in efficiency at small speed change ratio
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH