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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—Interfacing connection type C
WITHDRAWN published on 20.6.2008
Selected format:Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 2: Verification and calibration of testing machines
WITHDRAWN published on 20.6.2008
Selected format:Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 3: Calibration of reference blocks
WITHDRAWN published on 20.6.2008
Selected format:Automobile air conditioning electrically driven compressor assembly
WITHDRAWN published on 1.7.2008
Selected format:Electrically driven compressor assembly for automobile air conditioning
WITHDRAWN published on 14.5.2018
Selected format:Gas engine driven air-condition (heat pump) unit
WITHDRAWN published on 1.7.2008
Selected format:(The parts and units of jigs and fixtures. Directional keys)
WITHDRAWN published on 1.1.1991
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WITHDRAWN published on 30.6.2008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WITHDRAWN published on 30.6.2008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WITHDRAWN published on 30.6.2008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:Latest update: 2026-04-20 (Number of items: 2 274 419)
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