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A U-Key is an implementation of the MIFARE RFID chip, encased in a plastic key style housing. It is used as a prepayment system on vending machines and for some self-service diving air compressors in Switzerland ==References== 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「U-Key」の詳細全文を読む スポンサード リンク
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