{HEAD ~ a rotatable power transfer shaft} positioned in {TAIL ~ the center} of said ring, said shaft extending through at least one of said top plate or bottom plate 
{ HEAD ~ a rotatable power transfer shaft } positioned in { TAIL ~ the center } of said ring , said shaft extending through at least one of said top plate or bottom plate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH