Without {TAIL ~ the circulating pump} 72 to force convection of the heated liquid in {HEAD ~ the shell} 12, the heat exchanger 10 would lose much of its efficiency 
Without { TAIL ~ the circulating pump } 72 to force convection of the heated liquid in { HEAD ~ the shell } 12 , the heat exchanger 10 would lose much of its efficiency
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH