That is, {TAIL ~ a defective circuit pattern sheet} 2′ is removed from continuously arranged circuit patterns of {HEAD ~ a first PCB sheet} 4 a 
That is , { TAIL ~ a defective circuit pattern sheet } 2′ is removed from continuously arranged circuit patterns of { HEAD ~ a first PCB sheet } 4 a
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH