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Standards GB - Chinese national standards - Page 7371
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 9234-1997
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Power reciprocating pump
WITHDRAWN published on 11.8.1997
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GB/T 9234-2008
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Power reciprocating pump
WITHDRAWN published on 1.7.2008
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GB/T 9235-1988
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Testing methods of steam reciprocating pump
WITHDRAWN published on 6.6.1988
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GB 9237-2001
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Mechanical refrigerating systems used for cooling and heating-Safety requirements
WITHDRAWN published on 10.1.2001
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GB/T 9238-1998
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Symbols for balancing machines and associated instrumentation
WITHDRAWN published on 2.11.1998
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GB/T 9239-1988
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Balance quality of rigid rotors--Determination of permissible residual unbalance
WITHDRAWN published on 1.6.1988
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GB/T 9239.2-2006
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Mechanical vibration—Balance quality requirements for rotors in a constant(rigid) state—Part 2:Balance errors
WITHDRAWN published on 8.9.2006
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GB/T 9246-1996
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Microscopes—Oculars (eyepieces)
WITHDRAWN published on 13.8.1996
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GB/T 9247-1996
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Microscopes—Condensers
WITHDRAWN published on 13.8.1996
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GB/T 9248-1988
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Methods of evaluating the performance of flowmeters for incompressible fluide
WITHDRAWN published on 27.5.1988
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