 |
| |||
| płyta | |||
| إسطوانة مهيأة: 7 phrases in 5 subjects |
| Antennas and waveguides | 1 |
| Isolation | 2 |
| Sound recording | 2 |
| Telegraphy | 1 |
| Thermal Energy | 1 |
|
| |||
| płyta | |||
| إسطوانة مهيأة: 7 phrases in 5 subjects |
| Antennas and waveguides | 1 |
| Isolation | 2 |
| Sound recording | 2 |
| Telegraphy | 1 |
| Thermal Energy | 1 |