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改进 设备 : 28 phrases in 11 subjects |
| Air defense | 1 |
| Aviation | 3 |
| Business | 4 |
| Commerce | 4 |
| Earth sciences | 1 |
| Economy | 2 |
| Electronics | 6 |
| French | 1 |
| Space | 1 |
| Technology | 4 |
| Transport | 1 |
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