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Signal conversion equipment for switched and unswitched voice frequency channels. Methods tests
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Telecontrol equipment and systems. Part 6. Telecontrol protocols compatible with ISO standards and ITU-T recommendations. Section 1. Application context and organization of standards
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Graphic technology. Process control for the production of half-tone colour separations, proof and production prints. Part 2. Offset lithographic processes
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Black-and-white motion picture films. Method for determination of speed numbers
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Optical materials. Methods of measurements of reflective index
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