 |
| wet density: 6 phrases in 5 subjects |
| Cement | 1 |
| Geophysics | 1 |
| Natural resourses and wildlife conservation | 2 |
| Silicate industry | 1 |
| Technology | 1 |
|
| wet density: 6 phrases in 5 subjects |
| Cement | 1 |
| Geophysics | 1 |
| Natural resourses and wildlife conservation | 2 |
| Silicate industry | 1 |
| Technology | 1 |