Harmonics are periodic distortions of voltage, present, or electric power sine waves. Harmonics in ability distribution devices tend to be because of non-linear hundreds like switched mode dc electricity provides and adjustable pace motor drives.Th? thao HLV Troussier xúc ??ng nh?n bánh sinh nh?t tr??c tr?n g?p Indonesia Trong b?a c?m tr?a ngày