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Control system for high frequency apparatus
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Power output indicator for high frequency apparatus
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High frequency oscillator
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Balancing condenser
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High power demountable tube
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Piezo-electric crystal holder
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Multiple reception system
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High power tube
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Demountable electron tube
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High power demountable electron tube
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High power demountable tube
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High frequency signaling apparatus
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Frequency changing system for high frequency signaling apparatus
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Frequency changing system
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Frequency changing apparatus
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