a sleeve having {HEAD ~ a pair} of {TAIL ~ inner teeth gears} engaged with said outer teeth gears for transmitting power between the rotary shafts 
of
a sleeve having { HEAD ~ a pair } of { TAIL ~ inner teeth gears } engaged with said outer teeth gears for transmitting power between the rotary shafts
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH