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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
Ferrite cores used in broadcast recever aerials blank detail specification--Assessment level A
WITHDRAWN published on 31.3.1989
Selected format:Cores for inductors and transformers for telecommunications--Part 2: Guides for the drafting of performance specifications
WITHDRAWN published on 1.1.1989
Selected format:Straight-sided spline--Dimensions, tolerances and verification
WITHDRAWN published on 1.1.1987
Selected format:Guide for the drafting of specifications for microwave ferrites
WITHDRAWN published on 1.1.1989
Selected format:Laminations for transformers and inductors for use in telecommunication and electronic equipment
WITHDRAWN published on 31.3.1989
Selected format:General specification for satellite television earth receive-only station
WITHDRAWN published on 1.1.1989
Selected format:General specification for satellite television earth receive—Only station
WITHDRAWN published on 25.4.1995
Selected format:Domestic satellite communication earth stations--General technical requirements--Part 2: Frequency division multiplex/frequency modulation telephony carriers
WITHDRAWN published on 1.1.1989
Selected format:Domestic satellite communication earth stations--General technical requirements--Part 3: Single channel per carrier
WITHDRAWN published on 1.1.1989
Selected format:Domestic satellite communication earth stations--Gereral technical requirements--Part 4:Television/frequency modulation carrier channel
WITHDRAWN published on 4.7.1989
Selected format:Latest update: 2026-02-27 (Number of items: 2 263 604)
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