{TAIL ~ The PCB} 1 wherein the metal having a conductivity lower than the conductivity of {HEAD ~ copper} is nickel 
{ TAIL ~ The PCB } 1 wherein the metal having a conductivity lower than the conductivity of { HEAD ~ copper } is nickel
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH