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Standards GB - Chinese national standards - Page 7659

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GB 4728.9-1985 WITHDRAWN

WITHDRAWN published on 1.1.1985

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GB/T 4728.9-1999 WITHDRAWN

Graphical symbols for diagrams—Part 9:Telecommunications:Switching and peripheral equipment

WITHDRAWN published on 23.3.1999

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GB/T 4728.9-2008 WITHDRAWN

Graphical symbols for diagrams—Part 9:Telecommunications:Switching and peripheral equipment

WITHDRAWN published on 28.5.2008

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GB 4729-1984 WITHDRAWN

Methods of evaluating the performance of electrical and pneumatic transmitters with analogue signals for use in industrial-process measurement and control systems

WITHDRAWN published on 1.1.1984

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electronic design (pdf) (848.80 USD)

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GB 4730-1984 WITHDRAWN

Methods of evaluating the performance of electrical and pneumatic controllers with analogue input and output signals for use in industrial process control

WITHDRAWN published on 1.1.1984

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