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| коэфициент вскрыши | |||
| коэффициент вскрышности | |||
| коэффициент вскрыши | |||
| 剥离系数: 17 phrases in 4 subjects |
| General | 13 |
| Geology | 1 |
| Mining | 2 |
| Oilfields | 1 |
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