air hole: 40 phrases in 19 subjects |
Astronautics | 1 |
Automated equipment | 1 |
Automobiles | 2 |
Aviation | 2 |
Construction | 1 |
Energy industry | 1 |
Gas processing plants | 1 |
General | 1 |
Makarov | 1 |
Navigation | 1 |
Oil / petroleum | 2 |
Oil and gas | 2 |
Oilfields | 2 |
Polygraphy | 1 |
Rail transport | 1 |
Silicate industry | 1 |
Technology | 14 |
Transport | 4 |
Welding | 1 |