'Crushing blow'
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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评审机制与时间线截稿日期：2026 年 2 月 22 日 23:59
在“多元差异”中寻求“普惠方案”
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