{HEAD ~ A transverse movable support bar} is mounted on {TAIL ~ the support arms} for supporting the post hole digger assembly balanced along the curved section of the boom 
is mounted on
{ HEAD ~ A transverse movable support bar } is mounted on { TAIL ~ the support arms } for supporting the post hole digger assembly balanced along the curved section of the boom
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH