Th?ng kê t? ??ng c?p nh?t khi k?t thúc bu?i t??ng thu?t tr?c ti?p k?t qu? x? s?Harmonics are periodic distortions of voltage, recent, or electricity sine waves. Harmonics in electric power distribution units tend to be brought on by non-linear loads like switched manner dc power materials and adjustable pace motor drives. Gi? x? s? Mi?n B?c l??n