{HEAD ~ The cleaning elements} are intercepted and directed by {TAIL ~ the slanted bar screen} to a tube cleaner return line for re injection upstream of the heat exchanger 
are intercepted by
{ HEAD ~ The cleaning elements } are intercepted and directed by { TAIL ~ the slanted bar screen } to a tube cleaner return line for re injection upstream of the heat exchanger
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH