| 单词 | conelrad |
| 释义 | conelrad in British English (ˈkɒnəlˌræd) noun a US defence and information system used between 1951 and 1963 in the event of air attack CONELRAD in American English (ˈkɑnəlˌræd) US noun a former system (from 1951 to 1963) of shifting broadcasting frequencies of AM stations to prevent possible use of their radio beams by enemy aircraft as a navigational aid Word origin con(trol of) el(ectromagnetic) rad(iation) |
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