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| 差动; 自动同步机; 差动自整角机 | |||
| 差动发电机; 差接同步机 | |||
| 差接自动同步机; 差级同步机; 差级同步; 差动自动同步机; 差动同步机 | |||
| differential synchro: 10 phrases in 4 subjects |
| Air defense | 2 |
| Electronics | 1 |
| Space | 1 |
| Technology | 6 |
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