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Standards GB - Chinese national standards - Page 5509
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 10987-1989
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Optical systems--Determination of parameters
WITHDRAWN published on 31.3.1989
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GB/T 10988-1989
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Veiling glare of optical systems--Methods of measurement
WITHDRAWN published on 31.3.1989
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GB 10989-1989
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Coating for optical element--Beam splitter coating
WITHDRAWN published on 1.1.1989
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GB/T 1099-1979
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Woodruff keys--Types and dimensions
WITHDRAWN published on 23.6.1979
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GB 10990-1989
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Microscopes--Graticules for oculars
WITHDRAWN published on 1.1.1989
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GB 10991-1989
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Microscopes--Connecting dimensions of tube slides and tube slots
WITHDRAWN published on 1.1.1989
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GB 10992-1989
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WITHDRAWN published on 1.1.1989
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GB/T 10992.1-1999
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Electrostatic copying machines—Document copiers
WITHDRAWN published on 23.3.1999
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GB/T 10992.1-2008
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Electrostatic copying machines--Part 1:Document copiers
WITHDRAWN published on 2.7.2008
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GB/T 10992.2-1999
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Electrostatic copying machines—Potable copiers
WITHDRAWN published on 23.3.1999
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