{TAIL ~ The first and second heat exchange chambers} respectively are labelled as {HEAD ~ the high and low temperature chambers} 
{ TAIL ~ The first and second heat exchange chambers } respectively are labelled as { HEAD ~ the high and low temperature chambers }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD