| |||
| слой пены | |||
|
foam layer : 4 phrases in 3 subjects |
| Firefighting and fire-control systems | 2 |
| Natural resourses and wildlife conservation | 1 |
| Plastics | 1 |
| |||
| слой пены | |||
|
foam layer : 4 phrases in 3 subjects |
| Firefighting and fire-control systems | 2 |
| Natural resourses and wildlife conservation | 1 |
| Plastics | 1 |