At the same time, {TAIL ~ a ring gear} 12 is formed by {HEAD ~ the molding} of the resin 3 
At the same time , { TAIL ~ a ring gear } 12 is formed by { HEAD ~ the molding } of the resin 3
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH