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| operating duty; operational task | |||
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操作 任 务 : 42 phrases in 9 subjects |
| Aviation | 7 |
| Construction | 1 |
| Electronics | 9 |
| Information technology | 1 |
| Project management | 1 |
| Space | 14 |
| Steel production | 1 |
| Technology | 6 |
| Telecommunications | 2 |
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