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| 录像管理 | |||
| video control: 23 phrases in 9 subjects |
| Aviation | 9 |
| Earth sciences | 1 |
| Electronics | 6 |
| Hydroelectric power stations | 1 |
| Information technology | 1 |
| Multimedia | 1 |
| Space | 1 |
| Technology | 2 |
| Telecommunications | 1 |
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