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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク radium dials ： ウィキペディア英語版 radium dials Radium dials are watch, clock and other instrument dials painted with radioluminescent paint containing radium-226. The 1900s (decade) were the peak of radium dial production, as radiation poisoning was then unknown; subsequently, radium dials have largely been replaced by phosphorescent- or occasionally tritium-based light sources. ==Brands== *''Undark'' produced by the United States Radium Corporation *''Luna'' produced by the Radium Dial Company *''Marvelite'' produced by the Cold Light Manufacturing Company (a subsidiary of the Radium Company of Colorado) 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「radium dials」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.