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无 振荡 : 35 phrases in 14 subjects |
| Architecture | 2 |
| Automobiles | 3 |
| Aviation | 1 |
| Construction | 1 |
| Desert science | 1 |
| Earth sciences | 1 |
| Electronics | 9 |
| General | 1 |
| Information technology | 1 |
| Metallurgy | 3 |
| Space | 1 |
| Technology | 8 |
| Telecommunications | 1 |
| Wind Energy | 2 |
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