the inner diameter of said holes in the respective said regions varies in different said baffle plates, whereby {HEAD ~ radial flow} of the heat transfer fluid in said shell is established between {TAIL ~ said baffle plates} 
is established between
the inner diameter of said holes in the respective said regions varies in different said baffle plates , whereby { HEAD ~ radial flow } of the heat transfer fluid in said shell is established between { TAIL ~ said baffle plates }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL