{HEAD ~ The tube} in said exchanger is preferably provided by the conduit loop and has {TAIL ~ a surrounding shell} of sufficient strength to withstand the pressure of the second fluid, which in most cases, will be tap water 
has
{ HEAD ~ The tube } in said exchanger is preferably provided by the conduit loop and has { TAIL ~ a surrounding shell } of sufficient strength to withstand the pressure of the second fluid , which in most cases , will be tap water
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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