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Standards GB - Chinese national standards - Page 8678
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 7940.1-2001
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Pneumatic fluid power—Five-port directional control valves—Part 1:Mounting interface surfaces without electrical connector
WITHDRAWN published on 26.2.2001
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GB/T 7940.2-2001
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Pneumatic fluid power—Five-port directional control valves—Part 2:Mounting interface surfaces with optional electrical connector
WITHDRAWN published on 26.2.2001
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GB/T 7940.3-2001
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Pneumatic fluid power—Five-port directional control valves—Part 3:Code system for communication of valve functions
WITHDRAWN published on 26.2.2001
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GB/T 7941-1987
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Testing of refrigerating systems
WITHDRAWN published on 11.6.1987
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GB 7942-1987
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The classification of reflective projection screens
WITHDRAWN published on 1.1.1987
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GB 7943-1987
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Optical filters for photographic equipment--Dimensions
WITHDRAWN published on 1.1.1987
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GB/T 7944-1987
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Vocabulary for motion picture machinery
WITHDRAWN published on 10.6.1987
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GB 7945-1987
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Safety requirements for arc welding equipment--Plugs, socket-outlets and couplers for welding cables
WITHDRAWN published on 1.1.1987
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GB 7946-1987
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Installation and safe operation of electrically energized entanglements and electric fences
WITHDRAWN published on 10.6.1987
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GB/T 7946-2008
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Electrical installation and safe operation of electric security fences
WITHDRAWN published on 19.9.2008
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