Standards GB - Chinese national standards - Page 8999

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GB 9238-1988 WITHDRAWN

Balancing machines--Symbols for front panels

WITHDRAWN published on 1.1.1988

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GB/T 9238-1998 WITHDRAWN

Symbols for balancing machines and associated instrumentation

WITHDRAWN published on 2.11.1998

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GB/T 9239-1988 WITHDRAWN

Balance quality of rigid rotors--Determination of permissible residual unbalance

WITHDRAWN published on 1.6.1988

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GB/T 9239.1-2006 WITHDRAWN

Mechanical vibration - Balance quality requirements for rotors in a constant (rigid) state - Part 1: Specification and verification of balance tolerances

WITHDRAWN published on 8.9.2006

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