wherein {HEAD ~ the fluid handling apparatus} comprises {TAIL ~ heat exchange apparatus} of the shell and tube type, wherein each tube has therein an interrupter structure, and wherein each tube has at least one interrupter structure in contact with its external surface through which heat exchange takes place to fluid in the shell thereof, each last mentioned interrupter structure comprising: 
wherein { HEAD ~ the fluid handling apparatus } comprises { TAIL ~ heat exchange apparatus } of the shell and tube type , wherein each tube has therein an interrupter structure , and wherein each tube has at least one interrupter structure in contact with its external surface through which heat exchange takes place to fluid in the shell thereof , each last mentioned interrupter structure comprising :
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH