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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
Seed zones of Chinese forest trees--Seed zones of Picea asperata Mast.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Ulmus pumila L.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Cunning hamia lanceolata (Lamb.) Hook.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Pinus koraiensis Sieb.et zucc.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Pinus armandii Franch.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Pinus sylvestris var.mongolica Litvin.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Pinus massoniana Lamb.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Pinus yunnanensis Franch.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Larix gmelinii Rupr.
Standard published on 26.2.1988
Selected format:Seed zones of Chinese forest trees--Seed zones of Larix olgensis Henry.
Standard published on 26.2.1988
Selected format:Latest update: 2026-04-24 (Number of items: 2 274 650)
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