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| 频率多路传输 | |||
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frequency multiplexing : 44 phrases in 12 subjects |
| Air defense | 5 |
| Aviation | 1 |
| Business | 1 |
| Electronics | 20 |
| Geophysics | 1 |
| Information technology | 4 |
| Metallurgy | 1 |
| Multimedia | 1 |
| Shipbuilding | 1 |
| Space | 5 |
| Technology | 3 |
| Telecommunications | 1 |
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