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Keithley 2015 系列：THD 和音訊分析萬用電錶 (Discontinued)
This product has been discontinued.
The Keithley 2015 Series total harmonic distortion and audio analyzer multimeter is no longer available.
Technical documents and product support for current Keithley 2015 Series owners can be found at the links below.
Keithley 2015 Series: THD and Audio Analysis Multimeter