x? s? ki?n thi?t B? tr??ng Tài chính H? ??c Ph?c ch?t v?n casino Vân ??nHarmonics are periodic distortions of voltage, recent, or electrical power sine waves. Harmonics in ability distribution programs are frequently caused by non-linear masses like switched mode dc electrical power supplies and adjustable velocity motor drives.B? Tài chính ch