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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
Roughness comparison specimens—Cast surfaces
WITHDRAWN published on 30.12.1997
Selected format:Roughness comparison specimens—Ground, turned, bored,milled, shaped and planed
WITHDRAWN published on 6.6.1985
Selected format:Roughness comparison specimens—Spark-erosion machining surfaces
WITHDRAWN published on 13.5.1986
Selected format:Roughness comparison specimens--Polshed surfaces
WITHDRAWN published on 18.4.1988
Selected format:Roughness comparison specimens--Shot-blasted and grit-blasted surfaces
WITHDRAWN published on 18.4.1988
Selected format:Instruments for the measurement of surface roughness by the profile method--Vocabulary
WITHDRAWN published on 1.1.1985
Selected format:Stylus instruments for the measurement of surface roughness by the profile method--Profile recording instruments and profile meters by the system M
WITHDRAWN published on 1.1.1985
Selected format:Geometrical product specifications (GPS)—Surface texture-Profile method—Nominal characteristics of contact(stylus)instruments
WITHDRAWN published on 10.1.2002
Selected format:Model YA round vibrating screen
WITHDRAWN published on 1.1.1985
Selected format:Model ZKX linear vibrating screen
WITHDRAWN published on 1.1.1985
Selected format:Latest update: 2026-04-24 (Number of items: 2 274 650)
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