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Standards GB - Chinese national standards - Page 8541
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 6656-2008
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D.C. ferrite permanent magnet motors
WITHDRAWN published on 30.6.2008
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GB/T 6657-1986
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Measurement of electroacoustic characteristics of hearing aids
WITHDRAWN published on 31.7.1986
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GB/T 6658-1986
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Measurement of electroacoustical characteristics of hearing aids with induction pick-up coil input
WITHDRAWN published on 31.7.1986
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GB/T 6659-1986
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Measurement of electroacoustical characteristics of hearing aids with automatic gain control circuits
WITHDRAWN published on 31.7.1986
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GB/T 666-1993
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Chemical reagent—Zine sulfate heptahydrate
WITHDRAWN published on 1.3.1993
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GB 6660-1986
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Symbols and other markings on hearing aids and related equipment
WITHDRAWN published on 1.1.1986
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GB/T 6662-1986
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Methods of measurement for equipment used in terrestrial radio-relay systems—Part 1:Measurements common to sub-systems and simulated systems—Section three—Measurements in the intermediate-frequency range
WITHDRAWN published on 6.8.1986
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GB/T 6663-1986
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General specification for the directly heated negative temperature coefficient thermistors
WITHDRAWN published on 6.8.1986
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GB/T 6664-1986
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Blank detail specification for directly heated negative temperature coefficient thermistors—Assessment level E
WITHDRAWN published on 6.8.1986
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GB 6665-1986
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Detail specification for electronic component--Directly heated negative temperature coefficient thermistor STYLE ME11--Assessment level E
WITHDRAWN published on 1.1.1986
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