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单词 howler
释义 howler
[`hau̇l·ǝr]
COMMUNICATIONS
In telephone practice, an associated unit by which the test desk operator may connect a high tone of varying loudness to a subscriber's line to call the subscriber's attention to the fact that the phone receiver is off the hook.
ELECTRONICS
An audio device used to warn a radar operator that signals are appearing on a radar screen.
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