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Standards GB - Chinese national standards - Page 8608
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 6987.17-2001
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Aluminium and aluminium alloys—Determination of magnesium content—Flame atomic absorption spectrometric method
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GB/T 6987.18-2001
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Aluminium and aluminium alloys—Determination of chromium content—Flame atomic absorption spectrometric method
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GB/T 6987.19-2001
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Aluminium and aluminium alloys—Determination of zirconium content—Xylenol orange spectro photometric method
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GB/T 6987.2-2001
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Aluminium and aluminium alloys—Determination of copper content—Oxalyldihydrazide spectrophotometric method
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GB/T 6987.20-2001
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Aluminium and aluminium alloys—Determination of gallium content—Butyrhodamine B spectrophotometric method
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GB/T 6987.21-2001
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Aluminum and aluminum alloys—Determination of calcium content—Flame atomic absorption spectrometric method
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GB/T 6987.22-2001
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Aluminium and aluminium alloys—Determination of beryllium content—SCR spectrophotometric method
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GB/T 6987.23-2001
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Aluminium and aluminium alloys—Determination of antimony content—Potassium iodide spectrophotometric method
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GB/T 6987.24-2001
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Aluminium and aluminium alloys—Determination of the cerium subgroup of rare earth elements content—Tribromoarsenazo spectrophotometric method
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GB/T 6987.25-2001
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Aluminum and aluminum alloys—Determination of cadmium content—Flame atomic absorption spectrometric method
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