| 单词 |
program failure alarm |
| 释义 |
program failure alarm program failure alarm[′prō·grəm ′fāl·yər ə‚lärm] (communications) Signal-operated radio or television relay that gives a visual and aural alarm when the program fails on the line being monitored; a time delay is provided to prevent the relay from operating and giving a false alarm during station identification periods or other short periods of silence in program continuity. |
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