“pennyweight”的概念、定义、翻译、参考文献-科学参考

单词	pennyweight
释义	pennyweight [`pen·ē´wāt] ^MECHANICS A unit of mass equal to ¹/₂₀ troy ounce or to 1.55517384 grams; the term is employed in the United States and in England for the valuation of silver, gold, and jewels. Abbreviated dwt; pwt.
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