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Power supply systems based on renewable energy sources for rural electrification. Part 9-6. Photovoltaic systems. evaluation and selection of individual stand-alone systems depending on the degree of providing electrical loads
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Feeds, mixed feeds, raw material. Determination of water-soluble chlorides content
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Occupational safety standards system. Respiratory protective devices. Filtering half masks against aerosols with additional protection against vapors and gases. General technical requirements. Test methods. Marking
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Copper-iron-vanadium salable raw ores. Specifications
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Moulding sands and sand mixtures. Method for determination of clayey component
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