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双弹簧 : 96 phrases in 12 subjects |
| Architecture | 4 |
| Automobiles | 19 |
| Aviation | 1 |
| Compressors | 1 |
| Electric machinery | 1 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Shipbuilding | 2 |
| Technology | 63 |
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