Then {HEAD ~ the space} which is formed by removing {TAIL ~ the defective circuit pattern sheet} 2′ is filled with a second PCB sheet 4 b on which a good quality circuit pattern 2 b is printed 
is formed by removing
Then { HEAD ~ the space } which is formed by removing { TAIL ~ the defective circuit pattern sheet } 2′ is filled with a second PCB sheet 4 b on which a good quality circuit pattern 2 b is printed
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL 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 OTH