|
spiral casing : 13 phrases in 8 subjects |
| Astronautics | 1 |
| Electronics | 1 |
| General | 1 |
| Mining | 1 |
| Oil / petroleum | 4 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Technology | 3 |
|
spiral casing : 13 phrases in 8 subjects |
| Astronautics | 1 |
| Electronics | 1 |
| General | 1 |
| Mining | 1 |
| Oil / petroleum | 4 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Technology | 3 |