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