无定位调节作用所涉及的是这样一种调节机构，即它能停顿在其行程中的任意一处位置上。
Floating action refers to a controlled device which can stop at any point in its stroke.
对辐射源目标的无源定位在航海、航空、航天和电子战等领域具有十分重要的地位和作用。
Passive location of emitter source has been playing an important role in navigation, aviation, aerospace and electronic warfare.
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