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Eduard Karplus: Difference between revisions
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| [[566]] || Wavemeter || 1931-10 | | [[566]] || Wavemeter || 1931-10 | ||
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| [[687]] || Oscilloscope || 1934 ([https://www.ietlabs.com/genrad_history/genrad_museum GR Museum]) | |||
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| [[720]] || Heterodyne Frequency Meter || 1945-07 | | [[720]] || Heterodyne Frequency Meter || 1945-07 | ||