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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
QDZ process pneumatic control system--Computing unit
WITHDRAWN published on 1.1.1989
Selected format:QDZ-3 series process pneumatic control system--Indicating controller
WITHDRAWN published on 1.1.1989
Selected format:DDZ- series process electronic control system--Computing unit
WITHDRAWN published on 31.3.1989
Selected format:DDZ- series process electronic control system--Controller
WITHDRAWN published on 31.3.1989
Selected format:DDZ- series process electronic control system--Distributor
WITHDRAWN published on 31.3.1989
Selected format:DDZ-2 series process electronic control system--Computing unit
WITHDRAWN published on 1.1.1989
Selected format:DDZ-2 series process electronic control system--Controller
WITHDRAWN published on 1.1.1989
Selected format:Test method of electric conductivity analyzers
WITHDRAWN published on 31.3.1989
Selected format:Test method of industry gas analyzers
WITHDRAWN published on 1.1.1989
Selected format:Measuring methods of spectral response for solar cells
WITHDRAWN published on 31.3.1989
Selected format:Latest update: 2026-03-04 (Number of items: 2 265 056)
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