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Standards GB - Chinese national standards - Page 921
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 18311.28-2007
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Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-28: Examinations and measurements - Transient loss
Standard published on 29.6.2007
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GB/T 18311.3-2001
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Fibre optic interconnecting devices and passive components--Basic test and measurement procedures--Part 3-3:Examinations andmeasurements--Monitoring change in attenuation and in return loss (multiple paths)
Standard published on 13.2.2001
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GB/T 18311.30-2007
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Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-30: Examinations and measurements - Polish angle and fibre position on single ferrule multifibre connectors
Standard published on 29.6.2007
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GB/T 18311.34-2003
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Fibre optic interconnecting devices and passive components--Basic test and measurement procedures--Part 3-34:Examinations and measurements--Attenuation of random mated connectors
Standard published on 24.11.2003
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GB/T 18311.4-2003
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Fibre optic interconnecting devices and passive components--Basic test and measurement procedures--Part 3-4:Examinations and measurements--Attenuation
Standard published on 24.11.2003
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GB/T 18311.40-2003
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Fibre optic interconnecting devices and passivecomponents--Basic test and measurement procedures--Part 3-40:Examinations and measurements--Extinction ratio of a polarization maintaining(pm)fibre pigtailed connector
Standard published on 24.11.2003
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GB/T 18311.47-2026
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Fibre optic interconnecting devices and passive components—Basic test and measurement procedures—Part 3-47: Examinations and measurements—End face geometry of PC/APC spherically polished ferrules using interferometry
Standard published on 27.2.2026
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GB/T 18311.5-2003
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Fibre optic interconnecting devices and passive components--Basic test and measurement procedures--Part 3-5:Examinations and measurements--Wavelength dependence of attenuation
Standard published on 24.11.2003
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GB/T 18311.6-2001
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Fibre optic interconnecting devices and passive components--Basic test and measurement procedures--Part 3-6:Examinations and measurements--Return loss
Standard published on 13.2.2001
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GB/T 18312-2015
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Inspection rule for binoculars
Standard published on 10.12.2015
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