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Explosive atmospheres. Part 20-1. Material characteristics for gas and vapour classification. Test methods and data
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Transformer hermetic centrifugal electric pumps. Types. Basic parameters and dimensions
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United power system and isolated power systems. Thermal power plants. Automated process control systems. Conditions for the creation. Norms and requirements
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Canned foods. Preparation of reagent solutions, dyes, indicators and culture media for microbiological analysis
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