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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.
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Finally they had a breakthrough. They found an address that Harp believed was likely to feature a Flaming Alamo brick wall, and was on the sofa customer-base list.，详情可参考Line官方版本下载
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