Михаил Кирхгофф, дирижёр Детско-юношеского симфонического оркестра КО,
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![[Михаил Пенкин (МА)] Симметричные электрические цепи постоянного тока | Олимпиадная физика, задачи | 9, 10, 11 класс LIVE](https://sun9-39.userapi.com/impg/DFpLtimlr4Rz-QOi-PcDnau8wKuY0K8nW9dtJg/VSEcZrH0UZw.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=17b5d74a53e005867a2681c5919266a1&c_uniq_tag=S2y_kmgwDbNYok1Y9sb_xLzeS4v6m1y5Sch3fm0gCzY&type=video_thumb)
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