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Lanthanum, cerium, ytterbium, lutecium, yttrium and their oxides. Chemical-spectral method of determination of impurities in oxides of rare earth elements
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Mechanic environment stability test methods for machines, instruments and other industrial products. Bumps to enclosure of products
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The system of protection against fraud and counterfeiting. Prevention of the turnover of fraudulent, counterfeit and reused materials. General positions
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Photovoltaic modules. Performance testing and energy rating. Part 3. Determination of energy rating
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