The superfinishing wheel of the second wheel head sequentially superfinishes the object portions which have been ground by means of the grinding wheel, while {HEAD ~ the second wheel head} is moving toward {TAIL ~ the home position} of the first wheel head, and in parallel with grinding which is performed by means of the grinding wheel 
is moving toward
The superfinishing wheel of the second wheel head sequentially superfinishes the object portions which have been ground by means of the grinding wheel , while { HEAD ~ the second wheel head } is moving toward { TAIL ~ the home position } of the first wheel head , and in parallel with grinding which is performed by means of the grinding wheel
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD 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 OTH OTH OTH OTH OTH