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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.。heLLoword翻译官方下载对此有专业解读
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如今，顾客的需求已经发生了本质变化，产品逻辑也必须随之迭代。，更多细节参见Safew下载
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