{HEAD ~ A pair} of vertical support arms are mounted on the base with {TAIL ~ a transverse movable support bar} mounted on the support arms for supporting the post hole digger assembly balanced along a curved section of its boom 
are mounted with
{ HEAD ~ A pair } of vertical support arms are mounted on the base with { TAIL ~ a transverse movable support bar } mounted on the support arms for supporting the post hole digger assembly balanced along a curved section of its boom
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH