|
engine emissions : 26 phrases in 10 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Ecology | 11 |
| Engines | 1 |
| Environment | 1 |
| Makarov | 3 |
| Medical | 1 |
| Military | 1 |
| Technology | 4 |
| Transport | 1 |
|
engine emissions : 26 phrases in 10 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Ecology | 11 |
| Engines | 1 |
| Environment | 1 |
| Makarov | 3 |
| Medical | 1 |
| Military | 1 |
| Technology | 4 |
| Transport | 1 |