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集合器 : 39 phrases in 13 subjects |
| Air defense | 2 |
| Automobiles | 2 |
| Aviation | 4 |
| Earth sciences | 2 |
| Electronics | 8 |
| Information technology | 1 |
| Librarianship | 4 |
| Rail transport | 2 |
| Solar power | 1 |
| Space | 2 |
| Technology | 9 |
| Telecommunications | 1 |
| Textile industry | 1 |
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