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| 梁构造系统; 定向通信系统 | |||
| 定向系统; 定向制 | |||
| beam system: 118 phrases in 14 subjects |
| Air defense | 5 |
| Aviation | 13 |
| Earth sciences | 1 |
| Electronics | 30 |
| Engineering geology | 1 |
| General | 4 |
| Geology | 1 |
| Metallurgy | 5 |
| Radio | 1 |
| Rail transport | 1 |
| Space | 17 |
| Technology | 35 |
| Telecommunications | 2 |
| Thermal Energy | 2 |
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