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