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material properties : 16 phrases in 9 subjects |
| Bridge construction | 4 |
| Economy | 1 |
| Environment | 1 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Plastics | 1 |
| Shipbuilding | 3 |
| Technology | 3 |
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