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座 底板 : 31 phrases in 9 subjects |
| Automobiles | 3 |
| Bridge construction | 6 |
| Electric machinery | 1 |
| Electronics | 1 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Technology | 14 |
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