{HEAD ~ Fluid power mechanisms} are disposed on the support structure for moving {TAIL ~ the support structure} upwardly and downwardly relative to the ground 
{ HEAD ~ Fluid power mechanisms } are disposed on the support structure for moving { TAIL ~ the support structure } upwardly and downwardly relative to the ground
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH