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