For the upper frame of the excavator, the driver's cab is enlarged within the range of adjusting angle, and the driver's cab installation with enlarged view range is enabled.The old case of the excavator cab of the tank deviceOn the lower propulsion body, the upper frame is used,The upper frame is suitable for installing the shovel in the cab,For the above frame, place the front part of the above cab on the hinge and,The above frame is arranged between the rear side of the cab, and the air cushion structure is arranged to form the upper mechanical transport room from the east to the front.
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