In {TAIL ~ the exemplary embodiment}, the tube is {HEAD ~ a nuclear fuel rod} and the internal components are fuel pellets 
In { TAIL ~ the exemplary embodiment } , the tube is { HEAD ~ a nuclear fuel rod } and the internal components are fuel pellets
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH