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板式梁 : 57 phrases in 9 subjects |
| Automobiles | 1 |
| Bridge construction | 7 |
| Hydroelectric power stations | 1 |
| Lighting other than cinema | 1 |
| Metallurgy | 4 |
| Rail transport | 2 |
| Technology | 39 |
| Water resources | 1 |
| Wind Energy | 1 |
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