Equipment of wired communication. Methods for measuring acoustic noise
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Devices for speech reception and transmission. Methods of measuring acoustic noises
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Facsimile apparatus. Methods of tests
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Facsimile devices. Methods of tests
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Test table 0159K-12 for facsimile devices
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Facsimile devices. Reliability test methods
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Channels of data transmission. Methods of measuring parameters
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5-element code start-stop page printing apparatus. Methods of electric measurements
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Apparatus telegraph start-stop, 5-element code. Methods of electric parameters measuring
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Printing teletypes for 5-elements code. Reliability test methods
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Transmitters marine single-band. Methods of measurements and tests
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Equipment for tonal wiring with frequency modulation. Method of measurement of electrical parameters
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