…There are three types of balance: avoirdupois, troy, and apothecary. The avoirdupois pound is the base unit, and the other two are derived from the grain (gr), which is 1/7000 of avoirdupois pound. The size of the avoirdupois pound used to vary from country to country, but the international pound was adopted by the major standards organizations of English-speaking countries and has been the standard since July 1959. Its size is defined based on the International Prototype Kilogram and is exactly equal to 0.453 592 37 kg, or 453.592 37 g. … *Some of the terminology that mentions "international pound" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…常衡,トロイ衡,薬衡の別があり,現在は常用ポンドを基本単位とし,他の2衡のポンドは1/7000常用ポンドのグレーン(gr)から導かれる。常用ポンドの大きさは従来国によって異なっていたが,英語圏諸国の主要標準機関の協議により〈国際ポンドinternational pound〉が採用され,1959年7月以降,実効上これに統一されている。その大きさは国際キログラム原器に基づいて定義され,厳密に,0.453 592 37kg,すなわち453.592 37gに等しい。… ※「international pound」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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