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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
Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3: Simulated systems--Section Two Measurements in the basehand
WITHDRAWN published on 12.4.1988
Selected format:Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3: Simulated systems--Section Six Measurements for sound-programme transmission
WITHDRAWN published on 12.4.1988
Selected format:Methods of measurement for equipment used in terrestrial radio-relay systems--Part 2:Measurements for sub-systems--Section One--General
WITHDRAWN published on 25.5.1988
Selected format:Methods of measurement for equipment used in terrestrial radio-relay systems--Part 2:Measurements for sub-systems--Section Four--Frequency modulators
WITHDRAWN published on 25.5.1988
Selected format:Methods of measurement for equipment used in terrestrial radio-relay systems--Part 2:Measurements for sub-systems--Section Five Frequency demodulators
WITHDRAWN published on 25.5.1988
Selected format:Methods of measurement for equipment used in terrestrial radio-relay systems--Part 2:Measurements for sub-systems--Section Seven Radio transmitters
WITHDRAWN published on 25.5.1988
Selected format:Methods of measurement for equipment used in terrestrial radio-relay systems--Part 2:Measurements for sub-systems--Section Eight Radio receivers
WITHDRAWN published on 25.5.1988
Selected format:Methods of measurement for equipment used in terrestrial radio-relay systems--Part 2: Mesurements for sub-systems--Section Nine Stand-by channel switching equipment
WITHDRAWN published on 25.5.1988
Selected format:Methods of measurement for the characteristics of sound reinforcement in auditoria
WITHDRAWN published on 1.1.1985
Selected format:Methods of measurement for the characteristics of sound reinforcement in auditoria
WITHDRAWN published on 24.7.1995
Selected format:Latest update: 2025-12-24 (Number of items: 2 253 093)
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