单词 | bumper |
释义 | bumper [`bǝm·pǝr] ENGINEERING 1. A metal bar attached to one or both ends of a powered transportation vehicle, especially an automobile, to prevent damage to the body. 2. In a drilling operation, the supporting stay between the main foundation sill and the engine block. 3. In drilling, a fishing tool for loosening jammed cable tools. METALLURGY A vibrating machine for ramming and consolidating sand into a mold. |
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