 |
| |||
| acier à l'oxygène; acier soufflé à l'oxygène pur | |||
| oxygen steel: 14 phrases in 3 subjects |
| Construction | 1 |
| Metallurgy | 12 |
| Natural resourses and wildlife conservation | 1 |
|
| |||
| acier à l'oxygène; acier soufflé à l'oxygène pur | |||
| oxygen steel: 14 phrases in 3 subjects |
| Construction | 1 |
| Metallurgy | 12 |
| Natural resourses and wildlife conservation | 1 |