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对机车柴油机中修整机清洁度进行了试验检测，提出了颗粒污染物等效直径的概念，给出了等效直径的计算公式和经验公式，并根据检测试验结果，提出了机车柴油机中修整机清洁度控制标准。
The concept of the equivalent diameter of particle contaminant was put forward. The calculation formula and empirical formula of equivalent diameter were given. Based on the test results, the concept of mid-range diesel engine repair Machine cleanliness control standards.