GB/T 20939-2007
AbolishedStructuring principles for technical products and technical product documentation - Letter codes - Main classes and subclasses of objects according to their purpose and task
技术产品及技术产品文件结构原则 字母代码 按项目用途和任务划分的主类和子类
Application Summary AI generated
This standard defines a letter-coding system for classifying technical objects and products based on their purpose and function, primarily used in electrical engineering and technical documentation. It is applied to structure product documentation, such as circuit diagrams, equipment lists, and manuals, ensuring consistent identification of components like motors, switches, or sensors across industries. The standard facilitates clear communication and data exchange in design, manufacturing, and maintenance contexts.
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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.