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| 同步发生器 | |||
| 同步发电机 | |||
| 同步信号发生器 | |||
| sync generator: 8 phrases in 5 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Technology | 4 |
| Telecommunications | 1 |
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