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试验和测试 : 28 phrases in 12 subjects |
| Air defense | 2 |
| Aviation | 5 |
| Business | 2 |
| Earth sciences | 1 |
| Economy | 2 |
| Information technology | 1 |
| Mechanics | 1 |
| Mining | 2 |
| Shipbuilding | 3 |
| Space | 7 |
| Technology | 1 |
| Transport | 1 |
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