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.
前款规定的处罚决定书，应当载明被处罚人的姓名、违法行为、处罚依据、罚款数额、时间、地点以及公安机关名称，并由经办的人民警察签名或者盖章。
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