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| |||
| recorded signal; tracer signal | |||
| register signal; write signal | |||
| 记录信 号: 33 phrases in 13 subjects |
| Acoustics | 1 |
| Air defense | 5 |
| Aviation | 5 |
| Communications | 1 |
| Earth sciences | 1 |
| Electronics | 2 |
| Geophysics | 2 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 2 |
| Space | 3 |
| Technology | 8 |
| Telecommunications | 1 |
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