Самодельный шлифовально-наждачный станок - YouTube
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![[Artyom Kositsyn] Светодиод из шлифовального диска своими руками.Карбид кремния-полупроводник.](https://sun9-44.userapi.com/c848620/v848620114/165731/bXNH1-5aWdQ.jpg)
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