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| 试验故障: 31 phrases in 11 subjects |
| Air defense | 1 |
| Automobiles | 2 |
| Aviation | 5 |
| Business | 5 |
| Electronics | 5 |
| General | 1 |
| Mechanics | 1 |
| Project management | 1 |
| Space | 5 |
| Technology | 4 |
| Wind Energy | 1 |
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