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