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Optical fibres. Part 1-43. Measurement methods and test procedures. Numerical aperture
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Objective lenses. Methods of measuring the flange focal and back focus distances
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Image intensifier and image converter tubes. Common rules of measuring electrical, viewing and optical parameters
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Information technology. Learning, education and training. Metadata for learning resources. Part 2. Dublin Core elements
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Information and communication technologies in education. Integrated automated control system general education. General regulations
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Photographic gelatine. Method of determination of hydrogen ions concentration
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