{HEAD ~ a surrounding ferrous cylindrical case} having {TAIL ~ an enclosing configuration} and a hollow interior, said case having an outside surface, an inside surface, and a central axis, 
{ HEAD ~ a surrounding ferrous cylindrical case } having { TAIL ~ an enclosing configuration } and a hollow interior , said case having an outside surface , an inside surface , and a central axis ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH