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In the maintenance process of ultra-high pressure hydraulic valves, disassembling and cleaning the valves is the first step. In the actual use of hydraulic equipment, oil pollution can cause oil stains to settle, or there may be some granular impurities in the hydraulic oil, which can cause faults in the ultra-high pressure hydraulic valve. Usually, these faults can be eliminated after disassembly and cleaning, so that the ultra-high pressure hydraulic valve can restore its function.