 |
|
fixed gas : 14 phrases in 9 subjects |
| Drilling | 1 |
| Ecology | 2 |
| Energy system | 1 |
| General | 1 |
| Makarov | 1 |
| Metallurgy | 1 |
| Public utilities | 1 |
| Technology | 5 |
| Thermal engineering | 1 |
|
|
fixed gas : 14 phrases in 9 subjects |
| Drilling | 1 |
| Ecology | 2 |
| Energy system | 1 |
| General | 1 |
| Makarov | 1 |
| Metallurgy | 1 |
| Public utilities | 1 |
| Technology | 5 |
| Thermal engineering | 1 |