GB/T 17851-1999
AbolishedGeometrical tolerancing--Datums and datum system
形状和位置公差 基准和基准体系
Application Summary AI generated
This standard specifies the definition, representation, and application rules for datums and datum systems used in geometrical tolerancing. It is applied in mechanical engineering and manufacturing industries to establish a consistent reference framework for specifying and verifying the location, orientation, and runout tolerances of features on components. The standard is critical for ensuring interchangeability and functional assembly in product design, quality inspection, and technical drawing interpretation.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.