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Electricity metering equipment AC. Acceptance inspection. Part 21. Particular requirements for electromechanical meters for active energy accuracy classes 0,5, 1 and 2

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Honey. Method for determination of optical activity

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Methods for the petrographic analysis of coals. Part 1. Vocabulary of terms

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Skidder winches. Safety requirements

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Instrumentation and machine building products. Marking

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Cylindrical steel gas-holders with constancy of volume. Parameters and basic dimensions

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