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Image intensifier and image converter tubes. Check of the testing voltage
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12,7 mm 9-track magnetic tapes with the density of recording of 32 flux changes per mm. Technical requirements
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Black-and-white photographic materials with transparent sublayer. Method of general sensitometric test
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Reprography. Copirography. Method for determination of toner usage in copiers utilizing dry electrostatic developer
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Low-power electronic tubes and valves. Methods of measurement of amplification factor
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