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| semibituminous coal | |||
| semi-bituminous coal | |||
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半烟煤 : 8 phrases in 6 subjects |
| Chemistry | 1 |
| Earth sciences | 1 |
| General | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
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