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Standards GB - Chinese national standards - Page 5707
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 12157-1989
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Analysis of water used in boiler and cooling system--Determination for dissolved oxygen--Internalelectrolysis
WITHDRAWN published on 29.12.1989
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GB/T 12157-2007
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Water for industrial circulating cooling system and boiler—Determination of dissolved oxygen
WITHDRAWN published on 13.8.2007
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GB 12158-1990
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General quideline for preventing electrostatic accidents
WITHDRAWN published on 5.1.1990
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GB 12158-2006
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General guideline for preventing electrostatic accidents
WITHDRAWN published on 22.6.2006
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GB 12159-1990
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Hairsprings for mechanical instruments
WITHDRAWN published on 1.1.1990
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GB/T 1216-1985
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Micrometers
WITHDRAWN published on 23.4.1985
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GB/T 1216-2004
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external micrometer
WITHDRAWN published on 10.2.2004
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GB 12160-1990
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Standard practice for calibration and classification of extensometers
WITHDRAWN published on 1.1.1990
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GB/T 12160-2002
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Calibration of extensometers used in uniaxial testing
WITHDRAWN published on 22.2.2002
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GB 12161-1990
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Measurement methods for properties of plastic scintillator
WITHDRAWN published on 1.1.1990
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