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Standards GB - Chinese national standards - Page 7587
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 7962.5-1987
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Colorless optical glass test methods Middle stress birefringence
WITHDRAWN published on 25.5.1987
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GB/T 7962.6-1987
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Colorless optical glass test methods Edge stress birefringence
WITHDRAWN published on 25.5.1987
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GB/T 7962.8-1987
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Colorless optical glass test methods Examination method for extent of bubble
WITHDRAWN published on 25.5.1987
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GB/T 7962.9-1987
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Colorless optical glass test methods Coefficient of optical absorption
WITHDRAWN published on 25.5.1987
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GB/T 7963-1987
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Sintered metal materials (excluding hardmetal)—Tensile test pieces
WITHDRAWN published on 26.6.1987
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GB/T 7964-1987
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Sintered metal materials (excluding hardmetal)—Tension testing at room temperature
WITHDRAWN published on 26.1.1987
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GB/T 7965-1987
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Acoustics--Measurement of underwater sound transducers
WITHDRAWN published on 22.6.1987
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GB/T 7966-1987
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Acoustics—Ultrasonic power measurement in the frequency range 0.510MHz
WITHDRAWN published on 22.6.1987
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GB/T 7966-2009
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Acoustics—Ultrasonics power measurement—Radiation force balances and performance requirements
WITHDRAWN published on 30.9.2009
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GB/T 7967-1987
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Acoustics--High-power characteristics and measurements of underwater sound projectors
WITHDRAWN published on 22.6.1987
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