The leveling apparatus 2, wherein at least a pair of the actuators are installed opposite to each other on a radial line drawn on a left or right side that is at an angle of about 40°˜50° to the center line in {TAIL ~ the length direction} of {HEAD ~ the lower frame} 
The leveling apparatus 2 , wherein at least a pair of the actuators are installed opposite to each other on a radial line drawn on a left or right side that is at an angle of about 40 ° ˜50 ° to the center line in { TAIL ~ the length direction } of { HEAD ~ the lower frame }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD