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Explosive atmospheres. Part 7. Equipment. Increased safety "e"
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Safety of transformers, reactors, power supply units and combinations thereof. Part 2-26. Particular requirements and tests for transformers and power supply units all for saving energy and other purposes
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Tea. Determination of alkalinity of water-soluble ash
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Carbon fibre. Determination filament's tensile properties
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Operation of a public communication network in order to ensure integrity and sustainable functioning. General requirements
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