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Standards GB - Chinese national standards - Page 977
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 18681-2002
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Thermal spraying--Low pressure plasma spraying--Ni-Co-Cr-Al-Y-Ta alloy coating
Standard published on 10.3.2002
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GB/T 18682-2002
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Specifications of physical vapour deposition TiN films
Standard published on 10.3.2002
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GB/T 18683-2025
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Laser surface hardening of iron and steel parts
Standard published on 29.8.2025
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GB/T 18684-2002
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Specifications of zinc/chromate coating
Standard published on 10.3.2002
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GB/T 18685-2017
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The blank diameters for rolling general purpose metric screw threads
Standard published on 29.9.2017
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GB/T 18686-2002
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Technical drawings preparation of lines by CAD systems
Standard published on 10.3.2002
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GB/T 18687-2012
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Agricultural irrigation equipment - Sprayers - General requirements and test methods
Standard published on 31.12.2012
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GB/T 18688-2023
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Agricultural irrigation equipment—Pressure losses in irrigation valves—Test method
Standard published on 27.11.2023
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GB/T 18689-2009
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Agricultural irrigation equipment Manually operated small plastics valves
Standard published on 30.11.2009
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GB/T 18690.1-2009
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Agricultural irrigation equipment - Filters for micro-irrigation - Part 1Terms, definitions and classification
Standard published on 30.11.2009
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