 |
| |||
| Betriebsfrequenz f; Netzfrequenz f | |||
| system frequency: 48 phrases in 12 subjects |
| Communications | 10 |
| Electronics | 21 |
| Foreign trade | 1 |
| General | 1 |
| High energy physics | 1 |
| Information technology | 1 |
| Mechanic engineering | 1 |
| Microelectronics | 1 |
| Reliability | 1 |
| Technology | 7 |
| Telecommunications | 1 |
| Transport | 2 |
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