从设计、工艺、制造、使用等方面概述精冲模芯的改进措施及延寿方法。
It summarizes how to take measures and improve methods to extend the lifetime of Fine Die from the aspects of its design, techniques, machining and using.
航线使用中如有50%以上发动机实际使用寿命超过平均翻修寿命，发动机就可以延寿，给出了延寿估算方法。
If the 50% actual operating time of aircraft engine is greater than the mean TBO in airline operation, the TBO can be prolonged. The method for estimating the prolonged life is also given.
航线使用中如有50%以上发动机实际使用寿命超过平均翻修寿命，发动机就可以延寿，给出了延寿估算方法。
If the 50% actual operating time of aircraft engine is greater than the mean TBO in airline operation, the TBO can be prolonged. The method for estimating the prolonged life is also given.
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