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单词 rubbing block
释义

rubbing block

noun

1
: an abrasive block that is commonly of sandstone and is used for cleaning, smoothing, or polishing (as marble, building stone, bricks)
2
: the part of an electric railway plow that makes contact with a conductor rail in a conduit

Word History

First Known Use

1843, in the meaning defined above

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更新时间:2024/9/21 22:49:26