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命令 操作 : 27 phrases in 13 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Business | 1 |
| Computer numerical control | 1 |
| Electronics | 8 |
| Information technology | 2 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Military | 1 |
| Project management | 1 |
| Space | 5 |
| Technology | 2 |
| Telecommunications | 2 |
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