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板煤 : 57 phrases in 9 subjects |
| Architecture | 1 |
| Coal | 1 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 5 |
| Metallurgy | 5 |
| Oil / petroleum | 1 |
| Technology | 38 |
| Textile industry | 1 |
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