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transponder | |||
transmitter-responder | |||
interrogator of friend or foe | |||
interrogator | |||
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transponder | |||
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challenger |
询问机 : 43 phrases in 11 subjects |
Air defense | 7 |
Aviation | 6 |
Economy | 2 |
Electronics | 6 |
General | 4 |
Information technology | 1 |
Securities | 1 |
Shipbuilding | 1 |
Space | 7 |
Technology | 7 |
United Nations | 1 |