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