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| 距离零位 | |||
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range zero : 31 phrases in 9 subjects |
| Air defense | 4 |
| Automobiles | 1 |
| Aviation | 7 |
| Electronics | 1 |
| General | 1 |
| Geophysics | 1 |
| Space | 10 |
| Technology | 5 |
| Telecommunications | 1 |
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