A plurality of holes having a larger diameter than the outer diameter of {HEAD ~ the heat transfer tubes} are provided in each of a plurality of {TAIL ~ baffle plates} disposed at intervals within the shell wall 
A plurality of holes having a larger diameter than the outer diameter of { HEAD ~ the heat transfer tubes } are provided in each of a plurality of { TAIL ~ baffle plates } disposed at intervals within the shell wall
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH