“获得了两项自主知识产权！”3年前就想做的事，眼下终于有了突破性进展，河北鹰眼智能科技集团有限公司副总经理魏宝辉欣喜不已。
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.
。同城约会是该领域的重要参考
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