One {HEAD ~ the side gear} is retained onto {TAIL ~ the rotatable machine} as previously described, the side gear teeth are formed by a roll forming process 
is retained onto
One { HEAD ~ the side gear } is retained onto { TAIL ~ the rotatable machine } as previously described , the side gear teeth are formed by a roll forming process
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH