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为保证飞机液压系统的安全可靠,必须要对系统中油液污染加以控制。我厂在总结多年实践经验的基础上,参照国外有关用粒子计数
To ensure the safety and reliability of aircraft hydraulic system, it is necessary to control the oil pollution in the system. I plant in the summary of many years of practical experience on the basis of reference to foreign countries with the particle count