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数据维护 : 37 phrases in 12 subjects |
| Automobiles | 1 |
| Aviation | 12 |
| Earth sciences | 1 |
| Electronics | 9 |
| Hydroelectric power stations | 1 |
| Information technology | 2 |
| Librarianship | 1 |
| Military | 1 |
| Project management | 1 |
| Space | 3 |
| Technology | 3 |
| Telecommunications | 2 |
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