H?i ??ng XSKT khu v?c mi?n Nam yêu c?u ??i lý ph?i cho ng??i bán l? tr? l?i vé s? ?Harmonics are periodic distortions of voltage, latest, or power sine waves. Harmonics in power distribution techniques are sometimes because of non-linear hundreds such as switched manner dc energy supplies and adjustable velocity motor drives.123B/124B/125B Bu