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Standards GB - Chinese national standards - Page 7521
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 3306.2-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of measurement of anode current and currents of grids having positive potential
WITHDRAWN published on 1.1.1982
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GB/T 3306.20-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of test of short-circuit and open-circuit
WITHDRAWN published on 1.1.1982
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GB/T 3306.21-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of measurement of microphone effect by method of shock excitation
WITHDRAWN published on 1.1.1982
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GB/T 3306.22-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of measurement of low-frequency cracks
WITHDRAWN published on 1.1.1982
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GB/T 3306.23-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of measurement of high-frequency cracks
WITHDRAWN published on 1.1.1982
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GB/T 3306.24-1982
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Measurements of the electrical properties of low-power electronic tubes--Method of measurement of hum
WITHDRAWN published on 1.1.1982
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GB/T 3306.3-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of measurement of current of grid having negative potential
WITHDRAWN published on 1.1.1982
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GB/T 3306.4-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of measurement of cathode current
WITHDRAWN published on 1.1.1982
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GB/T 3306.5-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of measurement of emission current from cathode
WITHDRAWN published on 1.1.1982
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GB/T 3306.6-1982
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Measurements of the electrical properties of low-power electronic tubes--Methods of test and measurement under rectifying conditions
WITHDRAWN published on 1.1.1982
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