Standards GB - Chinese national standards - Page 7516

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GB/T 3885.8-1983 WITHDRAWN

Methods for chemical analysis of spodumenite and lepidolite concentrates--The chromazurol S and cetyltrimethyl ammonium bromide photometric method for the determination of beryllium oxide content

WITHDRAWN published on 19.10.1983

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GB/T 3885.9-1983 WITHDRAWN

Methods for chemical analysis of spodumenite and lepidolite concentrates--The atomic absorption spectrophotometric method for the determination of calcium oxide and magnesium oxide contents

WITHDRAWN published on 19.10.1983

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GB 3886-1983 WITHDRAWN

Power thyristor converters for adjustable speed D. C. motor drives

WITHDRAWN published on 1.1.1983

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GB/T 3886.1-2001 WITHDRAWN

Semiconductor power convertors—Adjustable speed electric drive systems—General requirements—Part 1:Rating specifications, particularly for d.c. motor drives

WITHDRAWN published on 2.11.2001

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