The primary inner shell 30′ is formed with {TAIL ~ a coaxial sleeve extension} 151 connected to its sidewall at {HEAD ~ the shells} secondary end 34 
The primary inner shell 30′ is formed with { TAIL ~ a coaxial sleeve extension } 151 connected to its sidewall at { HEAD ~ the shells } secondary end 34
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH