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  1. Standing wave ratio - Wikipedia › wiki › Standing_wave_ratio

    The power standing wave ratio (PSWR) is defined as the square of the VSWR, however, this deprecated terminology has no physical relation to actual powers involved in transmission. SWR is usually measured using a dedicated instrument called an SWR meter.

  2. Strain wave gearing - Wikipedia › wiki › Strain_Wave_Gearing

    Strain wave gearing (also known as harmonic gearing) is a type of mechanical gear system that uses a flexible spline with external teeth, which is deformed by a rotating elliptical plug to engage with the internal gear teeth of an outer spline.

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