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| secure communication | |||
| safety communication | |||
| 安全通信: 90 phrases in 13 subjects |
| Agriculture | 2 |
| Air defense | 4 |
| Automobiles | 1 |
| Aviation | 7 |
| Computer networks | 2 |
| Cryptography | 36 |
| Electronics | 20 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Information technology | 3 |
| Space | 9 |
| Technology | 1 |
| Telecommunications | 2 |
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