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12 giờ trước Nhận định, soi kèo Romania vs Bắc Ireland: Sắc vàng rực rõ Harmonics are periodic distortions of voltage, existing, or electrical power sine waves. Harmonics in power distribution units will often be attributable to non-linear hundreds such as switched method dc ability supplies and adjustable pace motor https://minerr135mml6.wikipublicist.com/user

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