 |
| alternative fuel: 24 phrases in 14 subjects |
| Armored vehicles | 1 |
| Cement | 5 |
| Ecology | 1 |
| Energy industry | 3 |
| European Union | 1 |
| General | 2 |
| Military | 2 |
| NATO | 1 |
| Oil and gas | 3 |
| Oil and gas technology | 1 |
| Oil processing plants | 1 |
| Production | 1 |
| Solar power | 1 |
| Transport | 1 |
|
| alternative fuel: 24 phrases in 14 subjects |
| Armored vehicles | 1 |
| Cement | 5 |
| Ecology | 1 |
| Energy industry | 3 |
| European Union | 1 |
| General | 2 |
| Military | 2 |
| NATO | 1 |
| Oil and gas | 3 |
| Oil and gas technology | 1 |
| Oil processing plants | 1 |
| Production | 1 |
| Solar power | 1 |
| Transport | 1 |