The set of driven gears also comprises {TAIL ~ the gears} having different diameters which rotate independently on {HEAD ~ an output shaft} 
The set of driven gears also comprises { TAIL ~ the gears } having different diameters which rotate independently on { HEAD ~ an output shaft }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD