| |||
| Quecksilberkathode f | |||
| Quecksilberkatode f | |||
|
mercury cathode : 8 phrases in 5 subjects |
| Antennas and waveguides | 1 |
| Chemistry | 1 |
| Measuring instruments | 1 |
| Metallurgy | 1 |
| Technology | 4 |
| |||
| Quecksilberkathode f | |||
| Quecksilberkatode f | |||
|
mercury cathode : 8 phrases in 5 subjects |
| Antennas and waveguides | 1 |
| Chemistry | 1 |
| Measuring instruments | 1 |
| Metallurgy | 1 |
| Technology | 4 |