An upstream coolant header 22 in {HEAD ~ association} with {TAIL ~ the reactant header} 18 directs coolant to the reactor 
with
An upstream coolant header 22 in { HEAD ~ association } with { TAIL ~ the reactant header } 18 directs coolant to the reactor
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH