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Standards GB - Chinese national standards - Page 9012
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 7342-1987
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IEC provisional reference coupler for the calibration of earphones used in audiometry
WITHDRAWN published on 28.2.1987
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GB/T 7343-1987
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the frequency range of 10 kHz to 30 MHz Methods of measurement of the suppression characteristics of passive radio inerference filters and suppression components over
WITHDRAWN published on 2.3.1987
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GB 7344-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7344-1997
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General specification for A.C servomotors
WITHDRAWN published on 30.7.1997
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GB 7345-1987
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General requirements for electrical micro machine for automatic control system
WITHDRAWN published on 1.1.1987
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GB/T 7345-1994
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General requirements for electrical micro machine for automatic control system
WITHDRAWN published on 21.1.1994
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GB 7346-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7346-1998
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Basic outline constructional type for control motors and feedback components
WITHDRAWN published on 19.1.1998
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GB/T 7348-1987
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The standard spectrum of whispered Chinese speech
WITHDRAWN published on 2.3.1987
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GB/T 7349-1987
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Methods of measurement of radio interference from high voltage overhead power transmission lines and substations
WITHDRAWN published on 1.1.1987
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