| 摘要 |
A method and apparatus for high speed grading a road in a single pass. The grader including a frame supported above a surface. At least one blade is pivotally fixed to the frame, and is positionable to engage the surface. A first biasing mechanism biases the blade toward a forward position. At least one leveling board is pivotally fixed to the frame, and is positionable to engage the surface rearwardly of the blade. A second biasing mechanism biases the leveling board toward a forward position. A packing mechanism is fixed rearwardly of the leveling board, and is positionable to engage the surface.
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