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单词 pound-force
释义

pound-force

noun
A unit of force equal to the weight of a mass of one pound avoirdupois, especially under standard gravity (when it is equivalent to approx. 4.45 newtons); abbreviated lbf.

Origin

Mid 19th century; earliest use found in Neil Arnott (1788–1874), physician and public health reformer.

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更新时间:2024/12/23 23:19:21