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Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.
。谷歌浏览器【最新下载地址】是该领域的重要参考
По словам эксперта, если вы начали получать подобные переводы, то эти денежные средства ни в коем случае нельзя тратить, и лучше незамедлительно обратиться в банк и в полицию.
Kerry Wan and Prakhar Khanna/ZDNETFollow ZDNET: Add us as a preferred source on Google.