| |||
| Netzfrequenz f | |||
|
mains frequency : 13 phrases in 5 subjects |
| Communications | 3 |
| Measuring instruments | 4 |
| Metallurgy | 1 |
| Technology | 4 |
| Telecommunications | 1 |
| |||
| Netzfrequenz f | |||
|
mains frequency : 13 phrases in 5 subjects |
| Communications | 3 |
| Measuring instruments | 4 |
| Metallurgy | 1 |
| Technology | 4 |
| Telecommunications | 1 |