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采用聚酰亚胺材料制造陀螺转子轴承保持架时，为提高轴承的寿命和可靠性，对聚酰亚胺含油保持架质量控制指标进行了分析，并作了相应的试验，得出结论是含油率和油保存率应定为质量考核指标。附图５ 幅，参考文献２篇。
In order to improve the service life and reliability of the bearing, the quality control index of the polyimide oil-containing cage was analyzed and the corresponding test was made when using the polyimide material to manufacture the rotor rotor bearing cage. It was concluded that the oil- Rate and oil retention rate should be set as a quality assessment index. Figure 5, reference 2 articles.