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圆垫 : 26 phrases in 9 subjects |
| Animal husbandry | 1 |
| Architecture | 1 |
| Automobiles | 3 |
| Bridge construction | 1 |
| General | 1 |
| Plastics | 1 |
| Technology | 12 |
| Telecommunications | 3 |
| Textile industry | 3 |
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