{HEAD ~ The stand} has {TAIL ~ a planar base} mounted on surface engaging members such as steerable casters 
has
{ HEAD ~ The stand } has { TAIL ~ a planar base } mounted on surface engaging members such as steerable casters
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH