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