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Atomichron The Atomichron was the world's first commercial atomic clock, built by the National Company, Inc of Malden, Massachusetts. It was also the first self-contained portable atomic clock and was a caesium standard clock. More than 50 clocks with the trademarked Atomichron name were produced.〔(【引用サイトリンク】url=http://web.archive.org/web/ */http://www.beyonddiscovery.org/includes/DBFile.asp?ID=84 )〕 == 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「Atomichron」の詳細全文を読む
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