This means is preferably comprised of {HEAD ~ a tube type heat exchanger} located between {TAIL ~ the valve} and the return inlet of the conduit to the absorber 
located between
This means is preferably comprised of { HEAD ~ a tube type heat exchanger } located between { TAIL ~ the valve } and the return inlet of the conduit to the absorber
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH