| |||
| tubage m | |||
|
pipe casing : 4 phrases in 3 subjects |
| Coal | 2 |
| Mechanic engineering | 1 |
| Natural resourses and wildlife conservation | 1 |
| |||
| tubage m | |||
|
pipe casing : 4 phrases in 3 subjects |
| Coal | 2 |
| Mechanic engineering | 1 |
| Natural resourses and wildlife conservation | 1 |