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优选石油机械零部件的可靠度，为设计提供合适的可靠性指标，是石油机械可靠性设计的关键。应用模糊优选可靠度基本原理，提出了石油机械零部件可靠度的模糊优选方法。对绞车滚筒轴可靠度的优选计算，表明该方法简便实用。
Optimizing the reliability of petroleum machinery parts and components to provide appropriate reliability indicators for the design is the key to the reliability design of petroleum machinery. Applying the basic principle of reliability of fuzzy optimization, a fuzzy optimization method of the reliability of petroleum machinery parts is put forward. The calculation of the reliability of winch drum axis shows that the method is simple and practical.