“equal-arm balance”的概念、定义、翻译、参考文献-科学参考

单词	equal-arm balance
释义	equal-arm balance [¦ē·kwal ¦ärm `bal·ǝns] ^MECHANICS A simple balance in which the distances from the point of support of the balance-arm beam to the two pans at the end of the beam are equal.
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