 |
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| underground mining method (Leonid Dzhepko) | |||
| подземный способ добычи: 3 phrases in 3 subjects |
| Construction | 1 |
| General | 1 |
| Geology | 1 |
|
| |||
| underground mining method (Leonid Dzhepko) | |||
| подземный способ добычи: 3 phrases in 3 subjects |
| Construction | 1 |
| General | 1 |
| Geology | 1 |