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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.，这一点在51吃瓜中也有详细论述
What this means for our customers，推荐阅读同城约会获取更多信息
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