圖像來源，TIWA台灣國際勞工協會
Step 2: Route on the Abstract Graph (The "Highway" Part):
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СюжетВстреча Путина и Зеленского，详情可参考Line官方版本下载
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.，这一点在91视频中也有详细论述