 |
| gas supply system: 26 phrases in 14 subjects |
| Apollo-Soyuz | 1 |
| Astronautics | 3 |
| Construction | 4 |
| Economy | 1 |
| Electronics | 4 |
| Energy industry | 1 |
| General | 3 |
| Makarov | 1 |
| Medical appliances | 1 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 2 |
| Production | 1 |
| Sakhalin | 1 |