GB - Chinese national standards

Technical requirements and test methods for tap-changer for ultra high voltage transformers

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Space environment—Test method of space radiation effects for space materials

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General rule for determination of nitrogen content by Dumas combustion method

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Natural esters—Guidelines for maintenance and use in electrical equipment

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Test methods for organic luminescence electronic and hole function material—Part 1Thermal property

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Test methods for organic luminescence electronic and hole functional material—Part 2: Optical properties

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Test methods for organic luminescence electronic and hole function material—Part 3Purity

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Chemicals—Determining anaerobic transformation test in liquid manure

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Classification for solar activity level

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Grade of geomagnetic activity

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