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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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WITHDRAWN published on 1.1.1986
Selected format:Specifications for cartographic symbols 15000 and 110000 topographic maps
WITHDRAWN published on 2.4.1993
Selected format:Ribbon cassettes used in serial matrix printers
WITHDRAWN published on 1.1.1986
Selected format:Basic size of the ribbon spools for drum line printers
WITHDRAWN published on 1.1.1986
Selected format:Office machines and printing machines used for information processing-spools of printing ribbons
WITHDRAWN published on 1.1.1986
Selected format:China standard book number
WITHDRAWN published on 1.1.1986
Selected format:China standard book numbering
WITHDRAWN published on 4.1.2002
Selected format:Metric trapezoidal screw threads—Profile
WITHDRAWN published on 21.1.1986
Selected format:Trapezoidal screw threads—Part 1:Profiles
WITHDRAWN published on 9.8.2005
Selected format:Metric trapezoidal screw threads—System of diameter and pitch
WITHDRAWN published on 21.1.1986
Selected format:Latest update: 2026-04-30 (Number of items: 2 275 280)
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