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| discrete signal; separative signal | |||
| 分离信 号: 30 phrases in 9 subjects |
| Air defense | 3 |
| Artificial intelligence | 3 |
| Aviation | 3 |
| Communications | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 15 |
| Telecommunications | 1 |
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