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Key may refer to: ==Common meanings== * Cay, also spelled key, a small, low-elevation, sandy island formed on the surface of a coral reef * Key (cryptography), a piece of information that controls the operation of a cryptography algorithm * Key (engineering), a type of coupling used to transmit rotation between a shaft and an attached item * Key (lock), device used to open a lock such as in a door * Key (map), a guide to a map's symbology * Key, a guide to colours and symbols used in a data chart, graph, plot or diagram 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「Key」の詳細全文を読む スポンサード リンク
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