?? h?a thi?t k? b?t m?t, bi?u t??ng s?c nét h?p d?n, kích thích nhu c?u tr?i nghi?m.Harmonics are periodic distortions of voltage, present, or ability sine waves. Harmonics in energy distribution devices are often a result of non-linear hundreds for example switched manner dc electricity supplies and adjustable velocity motor drives.?ây c?ng l�