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Standards GB - Chinese national standards - Page 349
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 13988-2025
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Types and dimensions for connectors of electronic photoflash equipment and synchro-cord
Standard published on 29.8.2025
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GB/T 13989-2012
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Subdivision and numbering for the national primary scale topographic maps
Standard published on 29.6.2012
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GB/T 13990-2012
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Specifications for aerophotogrammetric office operation of 1:5 000 1:10 000 topographic maps
Standard published on 29.6.2012
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GB/T 13992-2010
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Metallic bonded resistance strain gauges
Standard published on 1.12.2010
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GB/T 13993.1-2016
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Optical fibre cables for telecommunication—Part 1: General
Standard published on 25.4.2016
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GB/T 13993.2-2014
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Optical fibre cables for telecommunication—Part 2: Outdoor optical fibre cables for core networks
Standard published on 5.12.2014
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GB/T 13993.3-2014
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Optical fiber cables for telecommunicationPart 3: Indoor optical fibre cables for generic cabling
Standard published on 5.12.2014
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GB/T 13993.4-2014
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Optical fibre cables for telecommunicationPart 4: Outdoor optical fibre cables for access networks
Standard published on 5.12.2014
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GB/T 13997-1999
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Technical requirement for 2048kbit/s8448kbit/s34368kbit/s139264kbit/s optical line terminals
Standard published on 2.8.1999
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GB/T 13999-1992
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Two-track photographic soundrecords on 35mm motion-picture prints--Positions and width dimensions
Standard published on 17.12.1992
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