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材料 防腐 : 20 phrases in 11 subjects |
| Agriculture | 1 |
| Bridge construction | 1 |
| Construction | 1 |
| Electric machinery | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Nautical | 2 |
| Polymers | 1 |
| Refrigeration | 1 |
| Space | 1 |
| Technology | 8 |
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