T.Huy XSMB: Gi?i ??c bi?t k?t qu? x? s? Mi?n B?c ???c bao nhiêu v?y m?i ng??i ?i!Harmonics are periodic distortions of voltage, current, or electrical power sine waves. Harmonics in ability distribution techniques tend to be caused by non-linear masses for example switched method dc ability provides and adjustable velocity motor drives. + Các W