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Circulation may refer to: * Atmospheric circulation, the large-scale movement of air * Circulation (architecture), the flow of people through a building * Circulation (band), a UK house music duo * Circulation (currency), all currency held by consumers and businesses, but not by financial institutions and governments * Circulation Festival, an annual circus and fire performance festival held in Dunedin, New Zealand * ''Circulation'' (film), a 2008 psychological thriller-fantasy film by Ryan Harper * Circulation (fluid dynamics), the path integral of the fluid velocity around a closed curve * ''Circulation'' (journal), one of the journals published by American Heart Association * Circulation problem, a generalization of network flow problems * Circulatory system, a biological organ system whose primary function is to move substances to and from cells * Exhaust gas recirculation, a nitrogen oxide reduction technique used in most gasoline and diesel engines * Library circulation, the activities around the lending of library books and other material to users of a lending library * Magazine circulation, the average number of copies of a periodical distributed per edition/ volume * Newspaper circulation, the average number of copies of a newspaper distributed on a day * Rhetorical circulation, the ways that texts and discourses move through time and space == See also == * List of circulating currencies 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「Circulation」の詳細全文を読む スポンサード リンク
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