The assembly can expediently be either a swiveling movement around an axis of rotation or {HEAD ~ a translation movement} in {TAIL ~ one direction} 
The assembly can expediently be either a swiveling movement around an axis of rotation or { HEAD ~ a translation movement } in { TAIL ~ one direction }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL