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双 合型 : 22 phrases in 9 subjects |
| Automobiles | 2 |
| Chemistry | 5 |
| Compressors | 1 |
| Electronics | 3 |
| General | 2 |
| Plastics | 1 |
| Polymers | 2 |
| Technology | 2 |
| Textile industry | 4 |
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