39,717
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|series= | |series= | ||
|summary=Electrometer | |summary=Electrometer | ||
|image=Keithley | |image=Keithley 616 1.jpeg | ||
|caption=Keithley | |caption=Keithley 616 frontal view | ||
|introduced=(?) | |introduced=(?) | ||
|discontinued=(?) | |discontinued=(?) |