(Translated by https://www.hiragana.jp/)
力偶 - Wiktionary, the free dictionary

Chinese

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power; force; strength
accidental; image; pair
accidental; image; pair; mate
 
trad. (ちから) ちから
simp. #(ちから) ちから
 
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Noun

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ちから

  1. (physics) couple (two forces that are equal in magnitude but opposite in direction, and acting along parallel lines)