{HEAD ~ A fuel cell system} 14, wherein {TAIL ~ the first electrode} of each fuel cell is in contact with reactant permeable region of the associated substrate 
wherein
{ HEAD ~ A fuel cell system } 14 , wherein { TAIL ~ the first electrode } of each fuel cell is in contact with reactant permeable region of the associated substrate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH