It also has an end bar of {TAIL ~ hafnium} secured to {HEAD ~ the bottom plug} by a purely mechanical connection 
It also has an end bar of { TAIL ~ hafnium } secured to { HEAD ~ the bottom plug } by a purely mechanical connection
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH