Wheeled or crawler tractors equipped with a reinforced, curved steel plate mounted in front for pushing excavated material that are used for leveling dirt, debris and other materials. Dozers are often used for reducing or increasing grade elevations for roads, airports and land clearing operations; and are capable of ripping and moving ledge rock and other rock materials through the use of a special attachment. Included are bulldozers, track dozers and wheel dozers whose rubber tires can be used to compact earth that is being moved during the process of leveling.
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