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Standards GB - Chinese national standards - Page 8794
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 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WITHDRAWN published on 2.11.1998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WITHDRAWN published on 1.6.1988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WITHDRAWN published on 8.9.2006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 9240-1988
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Insection for optical instruments
WITHDRAWN published on 1.1.1988
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GB 9241-1988
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Light microscope--Vocabulary
WITHDRAWN published on 1.1.1988
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GB 9242-1988
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Microscopes--Connecting and fitting dimensions between ocular (eyepiece) and tube
WITHDRAWN published on 1.1.1988
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GB 9243-1988
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Microscopes--Magnifying power
WITHDRAWN published on 1.1.1988
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GB 9244-1988
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Microscopes--Dimensions and positions of holes for stage clips and attachable mechanical stage on microscope stage
WITHDRAWN published on 1.1.1988
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GB 9245-1988
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Microscopes--Connecting dimensions of dismountable condenser and colour filter
WITHDRAWN published on 1.1.1988
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GB 9246-1988
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Microscopes--Series of oculars (eyepieces)
WITHDRAWN published on 1.1.1988
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