Generally, {HEAD ~ said fuel cell} is a net producer of water, and {TAIL ~ said fuel processor} 12 is a net consumer of water 
Generally , { HEAD ~ said fuel cell } is a net producer of water , and { TAIL ~ said fuel processor } 12 is a net consumer of water
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH