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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。Safew下载是该领域的重要参考
25.6 万词汇表 — 庞大的词汇表能够很好地处理结构化数据和 JSON
contributed to this report.