 |
| |||
| Einheitsfrequenz f | |||
| Normalfrequenz f | |||
| Eichfrequenz f | |||
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standard frequency : 34 phrases in 8 subjects |
| Communications | 5 |
| Cultural studies | 1 |
| Electronics | 5 |
| General | 1 |
| Measuring instruments | 2 |
| Physics | 3 |
| Radio | 1 |
| Technology | 16 |
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