分析液压油液污染的原因和对液压系统工作性能的危害，提出了防止液压油液污染的具体措施，为液压系统的设计、使用提供一定的参考。%The paper analyzes the cause of pollution in hydraulic fluids and its harm to the operation performance of hydraulic system.Measures for controlling such pollution are proposed, which provides reference to the design and operation of the hydraulic system.
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