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