{HEAD ~ said sleeve} is formed with {TAIL ~ entrances} to said at least one shaft at opposite narrow ends of said sleeve, 
is formed with
{ HEAD ~ said sleeve } is formed with { TAIL ~ entrances } to said at least one shaft at opposite narrow ends of said sleeve ,
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH