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| |||
| secure communications | |||
| privacy communication; secret communication; secure communication | |||
| 保密 通信: 79 phrases in 11 subjects |
| Air defense | 9 |
| Aviation | 11 |
| Computer networks | 1 |
| Electronics | 21 |
| General | 1 |
| Information technology | 6 |
| Nautical | 1 |
| Space | 18 |
| Technology | 8 |
| Telecommunications | 2 |
| Textile industry | 1 |
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