 |
| |||
| direct heating | |||
| direct heating (combustion of fuel with air or oxygen within the bed of oil shale) | |||
| прямое нагревание: 2 phrases in 1 subject |
| Natural resourses and wildlife conservation | 2 |
|
| |||
| direct heating | |||
| direct heating (combustion of fuel with air or oxygen within the bed of oil shale) | |||
| прямое нагревание: 2 phrases in 1 subject |
| Natural resourses and wildlife conservation | 2 |