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「大阪880万人訓練」の緊急速報を受信したときのJR大阪駅の様子

By GIGAZINE

2021-06-24 10:22:59 有 343 人看過 有 4 人喜歡
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https://gigazine.net/news/20140905-osaka-drill/
9月5日(金)午前11時頃に最大626万台の携帯電話がマナーモードでも一斉に鳴動、「大阪880万人訓練」を実施 - GIGAZINE

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