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| 速率信号发生器; 导数信号发生器 | |||
| 速率发生器; 比率发电机 | |||
| rate generator: 9 phrases in 5 subjects |
| Air defense | 1 |
| Electronics | 4 |
| Geophysics | 1 |
| Information technology | 1 |
| Technology | 2 |
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