The axis track is an important characteristic to be used to diagnose the unit condition in the condition-based maintenance system of hydropower generating sets.
在水电机组状态检修系统中，轴心轨迹是诊断机组状态的一个重要特征。
With the single unit capacity of small and medium hydropower growing increasingly and the complex of unit structure, so it put forward a higher demand about unit maintenance.
随着中小型水电机组的单机容量不断增加，机组结构日趋复杂，对机组的检修提出了更高的要求。
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