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