 |
| |||
| forced draught | |||
| forced draft | |||
| künstlicher Zug: 4 phrases in 3 subjects |
| Industry | 2 |
| Mineral products | 1 |
| Natural resourses and wildlife conservation | 1 |
|
| |||
| forced draught | |||
| forced draft | |||
| künstlicher Zug: 4 phrases in 3 subjects |
| Industry | 2 |
| Mineral products | 1 |
| Natural resourses and wildlife conservation | 1 |