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| 膨胀系 (统) | |||
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expansion system : 28 phrases in 9 subjects |
| Aviation | 2 |
| Communications | 1 |
| Earth sciences | 2 |
| Economy | 1 |
| Electronics | 4 |
| Nautical | 3 |
| Refrigeration | 6 |
| Space | 1 |
| Technology | 8 |
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