An exhaust channel including {HEAD ~ a water recovery and recirculation system} is defined in {TAIL ~ the base portion} and communicating with the membrane electrode assembly 
An exhaust channel including { HEAD ~ a water recovery and recirculation system } is defined in { TAIL ~ the base portion } and communicating with the membrane electrode assembly
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH