{HEAD ~ A flow passageway} of fluid on the side of {TAIL ~ the shell} is composed of annular spaces formed between the outer circumference of the heat transfer tubes and the inner circumferences of the holes in the baffle plates 
{ HEAD ~ A flow passageway } of fluid on the side of { TAIL ~ the shell } is composed of annular spaces formed between the outer circumference of the heat transfer tubes and the inner circumferences of the holes in the baffle plates
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