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