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Standards GB - Chinese national standards - Page 7559
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 744-1989
WITHDRAWN
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Pulps—Determination of -cellulose
WITHDRAWN published on 30.11.1965
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GB/T 7440-1987
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Calculating methods and measuring methods for transmission parameters of open-wire communication lines
WITHDRAWN published on 16.3.1987
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GB/T 7441-1987
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Noise measurement method for the power plant turbine generator
WITHDRAWN published on 17.3.1987
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GB/T 7442-2001
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Electric angle grinders
WITHDRAWN published on 24.10.2001
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GB/T 7443-2001
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Electric rotary hammers
WITHDRAWN published on 2.11.2001
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GB/T 7445-1995
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Pure hydrogen and high pruity hydrogen and ultra pure hydrogen
WITHDRAWN published on 20.12.1995
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GB/T 7449-1987
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Guide to the lightning impulse and switching impulse testing of power transformers and reactors
WITHDRAWN published on 16.3.1987
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GB/T 745-1989
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Pulps--Determination of pentosan content
WITHDRAWN published on 22.2.1989
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GB/T 7450-1987
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Guidance for lightning protection for electronic equipments
WITHDRAWN published on 17.3.1987
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GB/T 7451-1987
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Electric light source vocabulary
WITHDRAWN published on 17.3.1987
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