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53.平均故障间隔时间(Средняянаработканаотказа或Наработканаотказ;Ｍｅａｎｏｐｅｒａｔｉｎｇｔｉｍｅｂｅｔｗｅｅｎｆａｉｌｕｒｅ)定义:一种可修复产品工作时间总和与在此工作时间内该产品故障次数的数学期望之比值。说明:此指?
53. Mean time between failure (Средняянаработканаотказа or Наработканаотказ; Meanoperatingtimebetweenfailure) Definition: The ratio of the sum of the working hours of a repairable product to the mathematical expectations of the number of failures of that product during that working time. Description: This refers to?