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Standards GB - Chinese national standards - Page 7534
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 3970-1983
WITHDRAWN
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Steel pins for pin insulators used on over head power and telegraph lines
WITHDRAWN published on 1.1.1983
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GB 3971.1-1983
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Numbering for automatic telephone in national communication network
WITHDRAWN published on 1.1.1983
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GB 3971.2-1983
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Interoffice junction digital line signalling system for telephone automatic switching network
WITHDRAWN published on 15.12.1983
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GB/T 3972-1992
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Relays for crossbar telephone switching systems
WITHDRAWN published on 6.10.1992
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GB/T 3973-1992
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Crossbar switches
WITHDRAWN published on 6.10.1992
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GB/T 39733-2020
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Recycling iron-steel materials
WITHDRAWN published on 14.12.2020
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GB/T 39737-2020
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Specification for national park establishment
WITHDRAWN published on 22.12.2020
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GB/T 3974-1983
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Telephone transmission interference allowances for long-distance high-capacity analogue microwave communication systems
WITHDRAWN published on 15.12.1983
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GB 3975-1983
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WITHDRAWN published on 1.1.1983
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GB/T 39752-2021
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Safety requirements and test specifications of electric vehicle conductive supply equipment
WITHDRAWN published on 9.3.2021
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