| |||
| выявление источников загрязнения | |||
|
identification pollution source : 5 phrases in 2 subjects |
| Ecology | 2 |
| Energy industry | 3 |
| |||
| выявление источников загрязнения | |||
|
identification pollution source : 5 phrases in 2 subjects |
| Ecology | 2 |
| Energy industry | 3 |