In FIG 1 is shown a wave gear drive comprising {TAIL ~ an inner gear} having {HEAD ~ a given number} of external teeth and an outer gear having a slightly larger number of internal teeth 
In FIG 1 is shown a wave gear drive comprising { TAIL ~ an inner gear } having { HEAD ~ a given number } of external teeth and an outer gear having a slightly larger number of internal teeth
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH