Experiments, inventions, patents, …
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????????? ??????? ? ??????? ?????????? ??? ??????????? ???? ? ?? ?? – ?? ??????? ?????? ??? LEDs and solar panels. ?????? ??????????? ???? ?????? ?????? https://www.youtube.com/watch?v=G_ekQiYd-ZU ???? ??????? ?? ?????? ??????? ????????! https://www.youtube.com/watch?v=eOKXKbFYpwM ????…
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