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| multiple wave | |||
| 多重波: 17 phrases in 9 subjects |
| Air defense | 5 |
| Automobiles | 1 |
| Aviation | 2 |
| Computer networks | 1 |
| Earth sciences | 2 |
| Electronics | 1 |
| General | 2 |
| Space | 1 |
| Technology | 2 |
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