 |
| |||
| guy derrick; pole derrick | |||
| well drilling derrick | |||
| derrick crane | |||
| derrick | |||
|
derrick : 37 phrases in 11 subjects |
| Agriculture | 4 |
| Construction | 1 |
| Geology | 1 |
| Health care | 5 |
| Industry | 1 |
| Mechanic engineering | 6 |
| Medical | 7 |
| Metallurgy | 5 |
| Natural resourses and wildlife conservation | 2 |
| Natural sciences | 1 |
| Transport | 4 |