用船上的备件改换磨损部件。
当二个金属部件互在其上运动时它们将迅速地磨损。
When two metal parts move over each other they will wear away rapidly.
并且再微小的颗粒污垢也会导致发动机相关内部零部件的严重磨损。
And again the tiny particles fouling will cause serious engine internal components.
飞机的所有部件都经过严密检查以确定是否有磨损或毁坏的迹象。
All parts of the aircraft are closely scrutinised for signs of wear or damage.
飞机的所有部件都经过严密检查以确定是否有磨损或毁坏的迹象。
All parts of the aircraft are closely scrutinised for signs of wear or damage.
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