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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
High resolution test chart of transparencies for television
WITHDRAWN published on 20.11.1986
Selected format:Checkerboard test chart of transparencies for television
WITHDRAWN published on 20.11.1986
Selected format:Amplitude response test chart of transparencies for television
WITHDRAWN published on 20.11.1986
Selected format:Registration test chart A of transparencies for television
WITHDRAWN published on 20.11.1986
Selected format:Registration test chart B of transparencies for television
WITHDRAWN published on 20.11.1986
Selected format:Gauges of pin caps
WITHDRAWN published on 22.11.1986
Selected format:Gauges of pin lamp caps
WITHDRAWN published on 5.11.2001
Selected format:Gauges of prefocus caps
WITHDRAWN published on 22.11.1986
Selected format:Gauges of prefocus caps
WITHDRAWN published on 5.8.2002
Selected format:Relative humidity tables for environmental test
WITHDRAWN published on 22.11.1986
Selected format:Latest update: 2026-06-21 (Number of items: 2 283 476)
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