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Harmonics are periodic distortions of voltage, current, or electricity sine waves. Harmonics in electrical power distribution systems are frequently due to non-linear loads which include switched mode dc ability materials and adjustable velocity motor drives. Bước 3. Đợi thời gian ngắn ứng dụng hoàn tất tải xuống anh em chọn https://x-s-mi-n-nam17925.frewwebs.com/26391549/new-step-by-step-map-for-xổ-số-miền-trung

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