 |
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| underground development of ore deposits (Leonid Dzhepko) | |||
| подземная разработка рудных месторождений: 5 phrases in 2 subjects |
| Construction | 1 |
| Gold mining | 4 |
|
| |||
| underground development of ore deposits (Leonid Dzhepko) | |||
| подземная разработка рудных месторождений: 5 phrases in 2 subjects |
| Construction | 1 |
| Gold mining | 4 |