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| heam directive transmission | |||
| beam transmission; directional transmission | |||
| 定 向 传输: 11 phrases in 7 subjects |
| Air defense | 2 |
| Automobiles | 1 |
| Electronics | 2 |
| General | 1 |
| Information technology | 2 |
| Space | 1 |
| Technology | 2 |
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