{HEAD ~ Core B} is seated within the lower shell portion C and is kept in place by {TAIL ~ the curved portion} 6 of upper shell portion A 
is kept by
{ HEAD ~ Core B } is seated within the lower shell portion C and is kept in place by { TAIL ~ the curved portion } 6 of upper shell portion A
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH