So the characteristics of the units failure rate are analyzed to obtain the probabilities of the minimal maintenance and probabilities of replacement due to failure, opportunistic and preventive.

分析了系统的故障率特性，确定了系统中各部件最小维修、故障更换、机会更换、预防性更换的概率。

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So the characteristics of the units failure rate are analyzed to obtain the probabilities of the minimal maintenance and probabilities of replacement due to failure, opportunistic and preventive.

分析了系统的故障率特性，确定了系统中各部件最小维修、故障更换、机会更换、预防性更换的概率。

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