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64.γ百分比寿命(Гамма-процентныйресурс;Ｇａｍｍａ-ｐｅｒｃｅｎｔｉｌｅｌｉｆｅ)定义:产品未达到概率为γ的极限状态的累计工作时间。65.平均寿命(Среднийресурс;Ｍｅａｎｌｉｆｅ或Ｍｅａｎｕｓｅｆｕｌｌｉｆｅ)定义:寿命的数学期望
64. γ Percentage Life (Gamma-percentilelife) Definition: The product does not meet the cumulative working hours for a limit state with a probability of γ. 65. Life expectancy (Среднийресурс; Meanlife or Meanusefullife) Definition: Mathematical expectation of life expectancy