a stack supported by and depending from the main plate, the stack having anodes and cathodes, wherein the main plate defines {HEAD ~ an exhaust plenum} with {TAIL ~ the stack} 
with
a stack supported by and depending from the main plate , the stack having anodes and cathodes , wherein the main plate defines { HEAD ~ an exhaust plenum } with { TAIL ~ the stack }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL