 |
| |||
| Linienbandschreiber m | |||
| continuous recorder: 7 phrases in 4 subjects |
| Measuring instruments | 2 |
| Natural resourses and wildlife conservation | 2 |
| Sound recording | 1 |
| Technology | 2 |
|
| |||
| Linienbandschreiber m | |||
| continuous recorder: 7 phrases in 4 subjects |
| Measuring instruments | 2 |
| Natural resourses and wildlife conservation | 2 |
| Sound recording | 1 |
| Technology | 2 |