drill steel: 54 phrases in 14 subjects |
Bridge construction | 1 |
Construction | 1 |
Drilling | 6 |
Electronics | 1 |
Geology | 2 |
Gold mining | 2 |
Mechanics | 2 |
Metallurgy | 1 |
Military | 2 |
Mining | 15 |
Oil / petroleum | 10 |
Oil and gas | 7 |
Oil and gas technology | 1 |
Technology | 3 |