GB/T 20110-2006 focuses on the cleanliness of parts and components in hydraulic transmission. The standard specifies inspection documents and guidelines related to the collection, analysis and data reporting of contaminants. Applicable to all types of hydraulic transmission parts and components. Clarifies the methods of collecting contaminants, such as washing, wiping and other operating specifications; Specifies the means of analyzing contaminants, including processes such as particle counting and component testing; Formulates data reporting guidelines, covering data recording, result presentation and other requirements. According to this standard, the cleanliness of hydraulic parts and components can be scientifically evaluated, ensuring the stable operation of hydraulic systems and improving equipment Reliability.