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| 可用材料; 可取得的材料; 现有材料 | |||
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available materials : 12 phrases in 8 subjects |
| Aviation | 1 |
| Bridge construction | 1 |
| Business | 1 |
| Commerce | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Technology | 5 |
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