{HEAD ~ The leveling apparatus} is mounted between an upper swing structure and {TAIL ~ a lower frame} formed on a lower driving structure including a swing bearing, left and right track chassis, and a front arm and a rear arm connected to upper parts of the track chassis 
is mounted between
{ HEAD ~ The leveling apparatus } is mounted between an upper swing structure and { TAIL ~ a lower frame } formed on a lower driving structure including a swing bearing , left and right track chassis , and a front arm and a rear arm connected to upper parts of the track chassis
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH