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信号数据 |
signal data : 52 phrases in 12 subjects |
Air defense | 2 |
Aviation | 14 |
Cables and cable production | 1 |
Computers | 1 |
Electronics | 13 |
General | 1 |
Geophysics | 1 |
Information technology | 1 |
Multimedia | 1 |
Space | 5 |
Technology | 10 |
Telecommunications | 2 |