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| reference signal | |||
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| reference signal | |||
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| reference signal | |||
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参考 信号 : 10 phrases in 8 subjects |
| Air defense | 1 |
| Artificial intelligence | 1 |
| Automobiles | 2 |
| Electronics | 2 |
| Information technology | 1 |
| Metallurgy | 1 |
| Technology | 1 |
| Telecommunications | 1 |
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