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