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