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Switch and method of assembly
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Multiple-circuit selector switch device
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Oscillator
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Signal generator
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Clamp-on electrical measuring instrument
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Frequency modulation device
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Indicating dial for photoelectric light meters
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Light acceptance aperture for light meters
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Electronic tube tester
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Indicating dial for photoelectric light meters
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Balancing member for the moving element of an indicating instrument
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Meter pivot
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Ratio meter
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Measuring device
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Differential electrodynamometer
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Radio tube tester
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Electrical measuring instrument
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Method and apparatus for testing radio receiving sets
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