Самодельный детектор скрытой проводки #detector #50hz
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![☢ Измерение радиации обычной вебкамерой. [Олег Айзон]](https://sun9-74.userapi.com/sjiBpXlXevHLxFJ0FduSdxbjFRPf1VmF_GYk0A/1m_1iWXEdUk.jpg)
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