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| coal preparation | |||
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备 煤 : 102 phrases in 12 subjects |
| Architecture | 1 |
| Business | 2 |
| Construction | 1 |
| Economy | 1 |
| Electronics | 4 |
| General | 4 |
| Household appliances | 1 |
| Mechanics | 1 |
| Metallurgy | 30 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 55 |
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