- low-frequency sign
- низкочастотный сигнал, НЧ-сигнал
The New English-Russian Dictionary of Radio-electronics. F.V Lisovsky . 2005.
low-frequency sign
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Sign-off — (or closedown) is the sequence of operations involved when a radio or television station shuts down its transmitters and goes off the air for a predetermined period; generally this occurs during the overnight hours. It is the opposite to a sign… … Wikipedia
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Traffic sign design — Any tasks involved in the process of designing a traffic sign. Traffic signs give you important information about the law, warn you about dangerous conditions and help you find your way. These signs vary depending upon their use; they use… … Wikipedia
