{HEAD ~ a limiting element} for limiting {TAIL ~ rotational displacements} of the second coupling element with respect to the first coupling element; and 
for limiting
{ HEAD ~ a limiting element } for limiting { TAIL ~ rotational displacements } of the second coupling element with respect to the first coupling element ; and
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