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| твёрдые горные породы | |||
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硬石岩 : 31 phrases in 8 subjects |
| Construction | 1 |
| Drilling | 4 |
| Electronics | 4 |
| General | 5 |
| Geology | 10 |
| Mining | 2 |
| Oil / petroleum | 2 |
| Technology | 3 |
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