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planchet
A planchet \ˈplan-chət\ is a round metal disk that is ready to be struck as a coin. An older word for planchet is flan. They are also referred to as blanks. ==History== The preparation of the flan or planchet has varied over the years. In ancient times, the flan was heated before striking because the metal that the coin dies were made of was not as hard as dies today, and the dies would have worn faster and broken sooner had the flan not been heated to a high temperature to soften it.
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「planchet」の詳細全文を読む
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