A work station system comprises {HEAD ~ a frame substructure} for holding aloft {TAIL ~ a horizontal axial shaft} 
for holding aloft
A work station system comprises { HEAD ~ a frame substructure } for holding aloft { TAIL ~ a horizontal axial shaft }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL