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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
Envelope for postal express mail service
WITHDRAWN published on 10.5.2002
Selected format:Packings for express service—Part 1:Envelopes
WITHDRAWN published on 12.6.2009
Selected format:Packings for express service—Part 2:Packing boxes
WITHDRAWN published on 12.6.2009
Selected format:Packings for express service—Part 3:Packing bags
WITHDRAWN published on 12.6.2009
Selected format:Methods of measurement of radiated interference from microwave ovens for frequencies above 1GHz
WITHDRAWN published on 12.11.1996
Selected format:Electrical relays—Part 10:Application of the IEC quality assessment system for electronic components to all-or-nothing relays
WITHDRAWN published on 12.11.1996
Selected format:Electromechanical elementary all-or-nothing relays of assessed quality—Part 1:Generic specification
WITHDRAWN published on 24.11.2003
Selected format:Electromechanical all-or-nothing relays—Part 50:Sectional specification—Electromechanical all-or-nothing telecom relays of assessed quality
WITHDRAWN published on 5.11.2012
Selected format:Electromechanical all-or-nothing relays—Part 51:Blank detail specification—Electromechanical all-or-nothing telecom relays of assessed quality—Non-standardized types and construction
WITHDRAWN published on 5.11.2012
Selected format:Electromechanical all-or-nothing relays—Part 52:Blank detail specification—Electromechanical all-or-nothing telecom relays of assessed quality—Two change-over contacts,20 mm×10 mm base
WITHDRAWN published on 5.11.2012
Selected format:Latest update: 2025-09-15 (Number of items: 2 233 685)
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