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United power system and isolated power systems. Operative-dispatch management. Remote control. Requirements for managing power grid equipment and relay protection and automation devices

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Plastics pipes for the conveyance of fluids under pressure. Miner's rule. Calculation method for cumulative damage

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Direction finders. Terms and definitions

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Metallic materials. Bend test

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Traps for sewer systems in buildings. Specifications

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Dressed krimmer lamb. Specifications

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