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 electricity distribution techniques are often attributable to non-linear hundreds including switched mode dc energy provides and adjustable speed motor drives. Gi?i m?i (bao