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为什么一夜之间手机就能在飞机上用了？
source link: http://tech.sina.com.cn/mobile/n/n/2018-01-21/doc-ifyquptv8292749.shtml
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这几天关注科技新闻和民生新闻的网友一定都看到了一系列相关新闻，即东航、海航、川航相继放开了飞机上手机必须关机的限制，乘客搭乘民航时，在规定条件内可以使用手机了。这无疑是一件大快人心的事，但就此也产生了不少了疑问。首先就是一直以来飞机上手机必
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