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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
Phosphor Y1 for oscilloscope tubes and display tubes
WITHDRAWN published on 30.12.1988
Selected format:Phosphor Y14 for oscilloscope tubes and display tubes
WITHDRAWN published on 30.12.1988
Selected format:Surface roughness--Parameters and their values
WITHDRAWN published on 1.1.1983
Selected format:Surface roughness parameters and their values
WITHDRAWN published on 10.5.1995
Selected format:Phosphor Y4-W2 for black-white picture tubes
WITHDRAWN published on 30.12.1988
Selected format:Phosphor Y4-B1 for black-white picture tubes
WITHDRAWN published on 30.12.1988
Selected format:Phosphor Y4-Y2 for black-white picture tubes
WITHDRAWN published on 30.12.1988
Selected format:Phosphor Y16 for radar indicator tubes
WITHDRAWN published on 30.12.1988
Selected format:Phosphor Y3 for double-decker screen indicator tubes
WITHDRAWN published on 30.12.1988
Selected format:Phosphor G11 for double-decker screen indicator tubes
WITHDRAWN published on 30.12.1988
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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