The core of passive location system is the passive locating method.
无源定位方法是无源探测系统的核心。
This method has become obsolete, it is now the most passive and least effective method.
这种方法已经过时了，现在已是最被动，最没效的方法。
A method of passive location and passive location technology for single object is studied.
研究了无源定位方法，以及单目标无源定位技术。
A method of passive location and passive location technology for single object is studied.
研究了无源定位方法，以及单目标无源定位技术。
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