Then, {HEAD ~ image processing} is conducted on {TAIL ~ the copper foil layer} 120 of the first base board 100  
is conducted on
Then , { HEAD ~ image processing } is conducted on { TAIL ~ the copper foil layer } 120 of the first base board 100
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH