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块连接 : 57 phrases in 13 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Electric machinery | 1 |
| Electronics | 19 |
| General | 1 |
| Geology | 1 |
| Information technology | 2 |
| Mechanics | 1 |
| Navigation | 4 |
| Space | 1 |
| Technology | 19 |
| Telecommunications | 4 |
| Wind Energy | 1 |
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