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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
20mm increment""s basic dimension series for subracks and subassemblies
WITHDRAWN published on 29.6.1989
Selected format:Series of basic dimensions of subracks and plug-in units for vertical increment of 44.45mm
WITHDRAWN published on 4.4.1986
Selected format:20mm increment""s basic dimension series for cabiners
WITHDRAWN published on 29.6.1989
Selected format:Series of basic dimensions of cases for electronic equipment
WITHDRAWN published on 4.4.1986
Selected format:Electric wires and cables--Test methods for determining electrical properties--General principles
WITHDRAWN published on 1.1.1983
Selected format:Test methods for determining electrical properties of electric cables and wires General
WITHDRAWN published on 19.5.1994
Selected format:Elesctric wires and cables--Test method for spark of extruded anti-corrosion protective sheaths
WITHDRAWN published on 1.1.1982
Selected format:Test methods for determining electrical properties of electric cables and wires Spark of extruded anti-corrosion protective sheaths
WITHDRAWN published on 19.5.1994
Selected format:Electric wires and cables--Test methods for dielectric dissipation factor measurement
WITHDRAWN published on 1.1.1983
Selected format:Test methods for determining electrical properties of electric cables and wires—Dielectric dissipation factor measurement
WITHDRAWN published on 19.5.1994
Selected format:Latest update: 2026-03-13 (Number of items: 2 266 261)
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