青云翻译

As the AC power grid frequency and effective component of a single frequency, so that any different with the power frequency component can be called harmonics.

Because of the effective components for power-frequency and single frequency AC power grid, so separate from any power cycle components can be called harmonics.

Because exchanges the electrical network active constituent for the power frequency sole frequency, therefore any all may call it with the power frequency frequency different ingredient the overtone.

Since communication grid for effective weight working frequency, therefore, any single frequency with the frequency different ingredients can also be called harmonics.

Because of the effective components for power-frequency and single frequency AC power grid, so separate from any power cycle components can be called harmonics.