The tubes and flanges are sized so that the tubes are squeezed as they pass through the plate holes, assuring {HEAD ~ good thermal contact} between the tubes and {TAIL ~ the plates} 
between
The tubes and flanges are sized so that the tubes are squeezed as they pass through the plate holes , assuring { HEAD ~ good thermal contact } between the tubes and { TAIL ~ the plates }
OTH 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 HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL