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| уголь, образовавшийся на месте | |||
| автохтонный уголь | |||
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| уголь на месте залегания | |||
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in-situ coal : 13 phrases in 4 subjects |
| Energy industry | 2 |
| Gas processing plants | 8 |
| Mining | 1 |
| Technology | 2 |
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