A wave gear drive comprises a rigid gear, a flexible gear engaging at {TAIL ~ a plurality} of bulged regions thereof with the rigid gear, and a wave generator for causing the flexible gear to perform {HEAD ~ wave motion} 
A wave gear drive comprises a rigid gear , a flexible gear engaging at { TAIL ~ a plurality } of bulged regions thereof with the rigid gear , and a wave generator for causing the flexible gear to perform { HEAD ~ wave motion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD