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Standards GB - Chinese national standards - Page 471
Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
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GB/T 14946.2-2019
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Information for national organization, cadre and personnel management—Part 2: Information classification and code lists
Standard published on 30.8.2019
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GB/T 14949.1-1994
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Manganese ores--Determination of chromium content
Standard published on 18.1.1994
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GB/T 14949.10-1994
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Manganese ores--Determination of cobaltcontent
Standard published on 18.1.1994
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GB/T 14949.11-2021
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Manganese ores—Determination of carbon content—Gravimetric method and infrared absorption method
Standard published on 20.8.2021
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GB/T 14949.12-2021
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Manganese ores—Determination of combined water content—Gravimetric method
Standard published on 21.5.2021
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GB/T 14949.2-2021
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Manganese ores—Determination of nickel content—Flame atomic absorption spectrometric method
Standard published on 20.8.2021
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GB/T 14949.3-1994
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Manganese ores--Determination of barium oxide content
Standard published on 18.1.1994
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GB/T 14949.4-1994
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Manganese ores--Determination of vanadium content
Standard published on 18.1.1994
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GB/T 14949.5-2021
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Manganese oresDetermination of titanium contentDiantipyrylmethane spectrophotometric method
Standard published on 21.5.2021
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GB/T 14949.6-2021
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Manganese ores—Determination of copper, lead and zinc content—Flame atomic absorption spectrometric method
Standard published on 11.10.2021
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