fire ring: 25 phrases in 15 subjects |
Aviation | 1 |
Electronics | 1 |
Forestry | 1 |
Gas processing plants | 2 |
General | 4 |
Geography | 3 |
Geology | 1 |
Gold mining | 1 |
Karachaganak | 2 |
Oil / petroleum | 1 |
Oil and gas | 1 |
Oil and gas technology | 1 |
Rail transport | 3 |
Technology | 2 |
Volcanology | 1 |