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The short ton is a unit of weight equal to , that is most commonly used in the United States where it is known simply as the ton.〔 〕 ==United States== In the United States, a short ton is usually known simply as a "ton",〔 without distinguishing it from the tonne (), known there as the "metric ton", or the long ton (), known there as the "Imperial ton". There are, however, some US applications where unspecified ''tons'' normally means long tons (for example, Navy ships)〔 (【引用サイトリンク】 title = Naval Architecture for All ) 〕 or metric tons (world grain production figures). Both the long and short ton are defined as 20 hundredweights, but a hundredweight is in the U.S. system (short or net hundredweight) and in the imperial system (long or gross hundredweight).〔 A short ton–force is . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「short ton」の詳細全文を読む スポンサード リンク
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