air base navigational aids 机场导航设备
Use this method when a new navigational state is to be constructed programmatically to serve as a base for several EngineURLs.
当以编程方式构造新导航状态以作为多个 EnginURL 的基状态时，请使用此方法。
Maintaining the base state ensures that the navigational state of previous interactions does not get lost.
维护基状态可确保不会丢失前面的交互的导航状态。
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