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Standards GB - Chinese national standards - Page 214
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
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GB/T 12634-1990
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Test methods for electroelastic constants of piezoelectric crystals
Standard published on 28.12.1990
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GB/T 12635-1990
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Ceramic base body using in carbon film resistor
Standard published on 28.12.1990
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GB/T 12636-1990
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Stripline test method for complexpermittivity of microwave dielectric substrates
Standard published on 28.12.1990
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GB/T 12639-2021
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Methods of in-orbit testing for GEO communication satellite payload performance
Standard published on 20.8.2021
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GB/T 1264-1997
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Chemical reagent--Sodium fluoride
Standard published on 9.9.1997
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GB/T 12640-1990
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Methods of measurement for the digital microwave radio relay communication equipments
Standard published on 28.12.1990
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GB/T 12642-2013
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Industrial robots - Performance criteria and related test methods
Standard published on 12.11.2013
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GB/T 12643-2025
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Robotics—Vocabulary
Standard published on 28.2.2025
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GB/T 12644-2001
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Industrial robots--Presentation of characteristics
Standard published on 12.11.2001
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GB/T 12646-1990
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Numerical control of machines--NC processor input--Basic part program reference language
Standard published on 28.12.1990
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