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Standards GB - Chinese national standards - Page 316

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 13611-2018

Classification and basic characteristics of city gas

Standard published on 15.3.2018

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GB/T 13611-2026

Classification and basic characteristics of urban gas
Execute Date: february 2027

Standard published on 2.7.2026

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GB/T 13612-2006

Manufactured gas

Standard published on 12.9.2006

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GB 13613-2011

Electromagnetic environment requirement for sea long range radio navigation stations and monitors

Standard published on 16.6.2011

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GB 13614-2012

Electromagnetic environment requirements for-Short-wave radio receiving and direction finding stations

Standard published on 29.6.2012

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GB/T 13615-2009

Electromagnetic environment protection requirements for earth stations

Standard published on 5.5.2009

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GB/T 13616-2009

Electromagnetic environment protection requirements for digital radio-relay stations

Standard published on 5.5.2009

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GB 13618-1992

Requirements of electromagnetic environment protection for air defense surveillance radar station

Standard published on 19.8.1992

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GB/T 13619-2009

Interference calculation methods for digital radio-relay systems

Standard published on 5.5.2009

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GB/T 13620-2009

Determination of coordination area and predication methods of interference between satellite communication earth station and terrestrial microwave station

Standard published on 5.5.2009

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