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Standards GB - Chinese national standards - Page 9345
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 9400-1988
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Dimensions of director radiator loudspeaker
WITHDRAWN published on 17.6.1988
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GB/T 9401-1988
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Methods of measurement for microphones
WITHDRAWN published on 17.6.1988
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GB/T 9402-1988
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Minimum performance requirements on high fidelity microphones
WITHDRAWN published on 17.6.1988
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GB/T 9403-1988
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The reflection grayscale test chart
WITHDRAWN published on 17.6.1988
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GB 9404-1988
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WITHDRAWN published on 1.1.1988
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GB 9405.1-1988
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General specification for electrodynamic cone loudspeaker of direct radiator type
WITHDRAWN published on 1.1.1988
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GB 9405.2-1988
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test methods of third order digital multiplex equipment--Operating at 34368kbit/s and using positive justification
WITHDRAWN published on 1.1.1988
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GB 9406-1988
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WITHDRAWN published on 1.1.1988
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GB 9407-1988
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WITHDRAWN published on 1.1.1988
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GB/T 9408-1988
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Specifications for colour TV modulation equipment(1TV+1 sound program)--Used in long-haul terestrial analog radio-relay systems
WITHDRAWN published on 23.6.1988
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