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Brown coals, hard coals, anthracites, coal briquettes and combustible shales. Methods for determination of mineral impurities (rock) and smalls
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Physical conditions in the space. Terms and definitions
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Intelligent power metering devices. General technical requirements
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Cable trunking systems and cable ducting systems for electrical installations. Part 2-3. Particular requirements for slotted cable trunking systems intended for installation in cabinets
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