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| 双向 | |||
| bi-directional: 33 phrases in 11 subjects |
| Air defense | 10 |
| Automobiles | 2 |
| Communications | 2 |
| Electric machinery | 2 |
| Hydroelectric power stations | 1 |
| Information technology | 1 |
| Oil / petroleum | 5 |
| Rail transport | 1 |
| Space | 3 |
| Textile industry | 4 |
| Wind Energy | 2 |
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