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检测电 路 : 30 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Electronics | 8 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Information technology | 1 |
| Project management | 1 |
| Shipbuilding | 1 |
| Space | 4 |
| Technology | 10 |
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