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Standards GB - Chinese national standards - Page 7879
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 4957-1985
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Non-conductive coatings on non-magnetic metal substrates--Measurement of coating thickness--Eddy current method
WITHDRAWN published on 14.2.1985
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GB/T 4958.1-1985
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Methods of measurement for equipment used in terrestrial radio-relay systems--Part 1: Measurement common to subsystems and simulated systems--Section One--General
WITHDRAWN published on 16.2.1985
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GB/T 4958.10-1988
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Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3:Simulated systems--Section One General
WITHDRAWN published on 25.5.1988
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GB/T 4958.11-1988
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Methods of measurement for equipment used in terestrial radio-relay systems--Part 3:Simulated systems--Section Three Measurements for monochrome and colour television transmission
WITHDRAWN published on 25.5.1988
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GB/T 4958.12-1988
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Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3:Simulated systems--Section Four Measurements for f.d.m. transmission
WITHDRAWN published on 25.5.1988
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GB/T 4958.13-1988
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Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3:Simulated systems--Section Five Measurement of mutual interference
WITHDRAWN published on 25.5.1988
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GB/T 4958.14-1992
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Methods of measurement for equipment used in terrestrial radio-relay systems.Part1:Measurements common to sub-systems and simulated radio-relay systems--Section two.Measurements in the radio-frequency range
WITHDRAWN published on 6.10.1992
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GB/T 4958.15-1992
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Methods of measurement for equipment used in terrestrial radio-relay systems.Part1:Measurements common to sub-systems and simulated radio-relay systems.Section 4.Measurements in the baseband
WITHDRAWN published on 6.10.1992
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GB/T 4958.16-1992
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Methods of measurement for equipment used in terrestrial radio-relay systems.Part2:Measurements for sub-systems.Section3 R.F.branching networks
WITHDRAWN published on 6.10.1992
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GB/T 4958.17-1992
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Methods of measurement for equipment used in terrestrial radio-relay systems.Part2:Measurements for sub-systems.Section6 Diversity twin-path and hot stand by equipment
WITHDRAWN published on 6.10.1992
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