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| quadrature signal | |||
| orthogonal signal | |||
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正交信 号 : 15 phrases in 7 subjects |
| Air defense | 2 |
| Electric machinery | 1 |
| Electronics | 3 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 3 |
| Telecommunications | 4 |
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