LED или накал, эксперимент с лампами МАЯК
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![Ртуть: Лекарство от Здоровья - [История Медицины]](https://sun9-20.userapi.com/4QsrCiEYH2gE_yJKY46OZH3cl7mVIpPGtm5O3A/Qk2Wqci9Ax8.jpg)
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