HLV ??c Th?ng kh?ng ??nh tham v?ng vô ??ch Cúp Qu?c gia và ch? ra ?T Vi?t Nam c?n m?t g??ng m?t này trong ??i hình c?a Viettel.Harmonics are periodic distortions of voltage, existing, or power sine waves. Harmonics in electrical power distribution devices are often caused by non-linear masses such as switched mode dc electrical power provides