GB/T 7939-2008

GB/Z 18427-2001 Hydraulic hose assembies--External leakage classification for hydraulic systems GB/Z 20423-2006 Hydraulic fluid power―Assembled systems―Verification of cleanliness GB/Z 41506-2022 Hydraulic fluid power—Fatigue pressure testing of metal pressure-containing envelopes—Rating methods GB/Z 41983-2022 Hydraulic screw-in cartridge valves cavities—Mounting dimensions GB/Z 42085-2022 Pneumatic fluid power—Assessment of component reliability by accelerated life testing—General guidelines and procedures GB/Z 42533-2023 Hydraulic fluid power—System—Method to relate the cleanliness of a hydraulic system to the cleanliness of the components and hydraulic fluid that make up the system GB/Z 43078-2023 Connections for hydraulic fluid power—Assembly instructions for adjustable stud end connectors GB/Z 43075-2023 Connections for hydraulic fluid power—Designation and nomenclature