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Standards GB - Chinese national standards - Page 5610
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 11282.1-1989
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B series pneumatic field mounted controllers--Level instrument
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GB 11282.2-1989
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B series pneumatic field mounted controllers--Pressure instrument
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GB 11282.3-1989
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B series pneumatic field mounted controllers--Temperature instrument
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GB 11282.4-1989
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B series pneumatic field mounted controllers--Differential pressure instrument
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GB 11282.5-1989
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B series pneumatic field mounted controllers--3-pens recording instrument
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GB 11283-1989
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The characteristic parameter of a diffuse reflective projection screen
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GB 11284-1989
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The characteristic parameter of a collective gain reflective projection screen
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GB 11285-1989
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Installation of a collective gain reflective projection screen
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GB 11286-1989
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Measurement of sound attenuation through a perforated reflective projection screen
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GB 11288-1989
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Under-excitation impedance protection equipment for generator
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