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| coalpetrography | |||
| coal petrography | |||
| anthracology | |||
| petrology of coal | |||
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| anthracology; coal petrology | |||
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煤岩学 : 8 phrases in 6 subjects |
| Earth sciences | 2 |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Geology | 1 |
| Technology | 2 |
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