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GB - Chinese national standards - Page 8586

Standards GB - Chinese national standards - Page 8586

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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Preview GB 7425.4-1987 1.1.1987

GB 7425.4-1987 WITHDRAWN

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Preview GB 7425.5-1987 1.1.1987

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Preview GB 7425.6-1987 1.1.1987

GB 7425.6-1987 WITHDRAWN

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Preview GB 7425.7-1987 1.1.1987

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Preview GB 7425.8-1987 1.1.1987

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Preview GB 7425.9-1987 1.1.1987

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Preview GB 7426-1987 1.1.1987

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Preview GB 7427-1987 1.1.1987

GB 7427-1987 WITHDRAWN

Location and width of the recording head gap for centre sound records on 16mm perforated magnetic film

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Preview GB 7428-1987 1.1.1987

GB 7428-1987 WITHDRAWN

Location and width of the recording head gap for edge sound records on 16mm perforated magnetic film

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Preview GB/T 7428-1994 28.12.1994

GB/T 7428-1994 WITHDRAWN

Head gaps for two sound records on 16mm magnetic film—Positions and width dimensions

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