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Standards GB - Chinese national standards - Page 6235
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 18688-2012
WITHDRAWN
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Agricultural irrigation equipment—Pressure losses in irrigation valves—Test methed
WITHDRAWN published on 31.12.2012
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GB/T 18689-2002
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Agricultural irrigation equipment—Manually operated small plastics valves
WITHDRAWN published on 10.3.2002
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GB/T 18690.2-2002
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Agricultural irrigation equipment—Filters—Strainer-type filters
WITHDRAWN published on 10.3.2002
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GB/T 18690.3-2002
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Agricultural irrigation equipment—Filters—Automatic self-cleaning strainer-type filters
WITHDRAWN published on 10.3.2002
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GB/T 18691-2002
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Agricultural irrigation equipment—Check valves
WITHDRAWN published on 10.3.2002
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GB/T 18691.1-2011
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Agricultural irrigation equipment—Irrigation valves—Part 1:General requirements
WITHDRAWN published on 12.5.2011
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GB/T 18691.2-2011
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Agricultural irrigation equipment—Irrigation valves—Part 2:Isolating valves
WITHDRAWN published on 12.5.2011
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GB/T 18691.3-2011
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Agricultural irrigation equipment—Irrigation valves—Part 3:Check valves
WITHDRAWN published on 12.5.2011
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GB/T 18691.4-2011
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Agricultural irrigation equipment—Irrigation valves—Part 4:Air valves
WITHDRAWN published on 12.5.2011
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GB/T 18691.5-2011
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Agricultural irrigation equipment—Irrigation valves—Part 5:Control valves
WITHDRAWN published on 12.5.2011
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