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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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