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Standards GB - Chinese national standards - Page 8750
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 7938-1987
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Fluid power systems and components--Cylinders--Nominal pressures
WITHDRAWN published on 12.6.1987
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GB/T 7939-1987
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Hydraulic fluid power--Hose assemblies--Method of test
WITHDRAWN published on 12.6.1987
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GB/T 7939-2008
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Hydraulic fluid power—Hose assemblies—Test methods
WITHDRAWN published on 14.1.2008
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GB/T 794-1993
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Strengthened cap head square neck bolts
WITHDRAWN published on 1.3.1993
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GB/T 7940-1987
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Pneumatic fluid power-five-port directional control valves--Mounting surfaces
WITHDRAWN published on 1.1.1987
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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WITHDRAWN published on 26.2.2001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WITHDRAWN published on 26.2.2001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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