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Standards GB - Chinese national standards - Page 7615
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 464.1-1989
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Paper and board--Accelerated ageing-dry heat treatment at 105
WITHDRAWN published on 31.3.1989
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GB/T 464.2-1993
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Paper and board—Accelerated ageing-Dry heat treatment at 120 or 150
WITHDRAWN published on 1.3.1993
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GB/T 4643-1984
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16mm negative photographic sound record on 16mm motion-picture film--Positions and dimensions
WITHDRAWN published on 14.8.1984
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GB/T 4643-2002
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Cinematography—16mm negative photographic sound record on motion-picture film-position and dimensions
WITHDRAWN published on 4.12.2002
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GB/T 4644-1984
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Magnetic stripes and recording and reproducing head gaps for magnetic sound recordson 16mm motion-picture film perforated along one edge--Positions and width dimensions
WITHDRAWN published on 14.8.1984
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GB 4645-1984
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WITHDRAWN published on 1.1.1984
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GB/T 4645-1994
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Screen luminance for the projection of motion-picture prints in indoor theatres and review rooms
WITHDRAWN published on 28.12.1994
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GB/T 4646-1991
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GEC... FSA type maintenance-free spherical plain radialbearings, joint type--Boundary dimensions
WITHDRAWN published on 1.1.1991
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GB 4648-1984
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Metric tapered roller bearings--Flanged cups--Boundary dimensions
WITHDRAWN published on 1.1.1984
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GB/T 4648-1996
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Rolling bearings—Metric tapered roller bearings—Flanged cups—Boundary dimensions
WITHDRAWN published on 18.12.1996
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