This standard serves as a foundational specification in the field of coating machines, systematically establishing a complete terminology system covering coating types, structural composition, key components, and quality defects. It provides a basis for unifying the technical communication language within the industry. The document clearly defines core components, from the unwinding unit and comma blade roller to the coating die head and rewinding unit, and precisely defines typical coating defects such as streaks, craters, and thick edges. In the practical application of the terminology system, it is often necessary to observe the microscopic profile of the blade edge using high-precision industrial microscopes, measure the cylindricity and surface smoothness of the coating roller with laser displacement sensors and roughness testers, and capture bubbles or scratches on the coating surface through online machine vision systems. This ensures an accurate correspondence between terminological concepts and physical entities.