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| подземная выработка; подземная добыча | |||
| подземная разработка | |||
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地下 开采 : 15 phrases in 6 subjects |
| Chemistry | 1 |
| Education | 1 |
| General | 6 |
| Mining | 1 |
| Technology | 4 |
| Water resources | 2 |
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