单词 | bulldozer |
释义 | bulldozer [`bu̇l´dōz·ǝr] MECHANICAL ENGINEERING A wheeled or crawler tractor equipped with a reinforced, curved steel plate mounted in front, perpendicular to the ground, for pushing excavated materials. METALLURGY A machine for bending, forging, and punching narrow plates and bars, in which a ram is pushed along a horizontal path by a pair of cranks that are linked to two bullwheels with eccentric pins. |
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