Exceptions include ACTS of God, the provider's scheduled downtime maintenance, or accidental cutting of the fiber optics line.

而异常情况包括不可抗拒自然力、提供者的预定停机维护或光纤线路的意外中断。

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One of the most important things in developing aircraft structure maintenance program is to determine the inspection intervals for structure accidental damage.

确定飞机结构偶然损伤检查间隔是制定飞机结构维修大纲的关键问题之一。

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