Aiming at the fault of silent sentry radar system in war field, a kind of method based on portable passive radar is introduced in this paper.
针对静默哨兵系统等隐身雷达的战场机动能力不足，提出了一种便携式无源侦察系统的设计方法。
The SENTRY GUNS are silent, and the GATES are open to the forest.
哨戒炮沉默了，地狱之门向森林敞开。
The SENTRY GUNS are silent, and the GATES are open to the forest.
哨戒炮沉默了，地狱之门向森林敞开。
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