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对空监视 | |||
空气污染监视 | |||
空中监视 | |||
English thesaurus | |||
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The systematic observation of air space by electronic, visual or other means, primarily for the purpose of identifying and determining the movements of aircraft, friendly and enemy, in the air space under observation. (FRA) | |||
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AS |
air surveillance : 68 phrases in 13 subjects |
Air defense | 6 |
Aviation | 16 |
Business | 1 |
Chemistry | 1 |
Desert science | 1 |
Earth sciences | 1 |
Ecology | 2 |
Electronics | 11 |
General | 3 |
Space | 13 |
Technology | 11 |
United States | 1 |
Wind Energy | 1 |