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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
Microscopes - Imaging distances related to mechanical reference planes - Part 1: Tube length 160mm
WITHDRAWN published on 20.6.2008
Selected format:Microscopes - Imaging distances related to mechanical reference planes - Part 2: Infinity-corrected optical systems
WITHDRAWN published on 20.6.2008
Selected format:Microscopes - Magnifying power
WITHDRAWN published on 20.6.2008
Selected format:Microscopes - Graticules for oculars
WITHDRAWN published on 20.6.2008
Selected format:Microscopes - Interfacing connection type C
WITHDRAWN published on 20.6.2008
Selected format:Automobile air conditioning electrically driven compressor assembly
WITHDRAWN published on 1.7.2008
Selected format:Test guide for instrument transformers - Part 1: current transformers
WITHDRAWN published on 30.6.2008
Selected format:Test guide for instrument transformers - Part 2: Inductive voltage transformers
WITHDRAWN published on 30.6.2008
Selected format:Specifications and technical requirements for dry-type amorphous alloy core distribution transformers
WITHDRAWN published on 30.6.2008
Selected format:Reliability test method for moulded case circuit-breakers
WITHDRAWN published on 30.6.2008
Selected format:Latest update: 2024-04-18 (Number of items: 2 859 866)
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