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| 信号: 258 phrases in 16 subjects |
| Electronics | 9 |
| General | 1 |
| Lighting other than cinema | 3 |
| Magnetics | 3 |
| Microsoft | 4 |
| Power lines | 25 |
| Radio | 47 |
| Radiobiology | 1 |
| Rail transport | 58 |
| Semiconductors | 2 |
| Sound recording | 2 |
| Telecommunications | 47 |
| Telegraphy | 47 |
| Telephony | 3 |
| Vacuum tubes | 2 |
| Video recording | 4 |
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