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盘圈 : 54 phrases in 13 subjects |
| Agriculture | 1 |
| Automobiles | 5 |
| Drilling | 3 |
| Electric machinery | 1 |
| Electronics | 4 |
| General | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
| Plastics | 1 |
| Rail transport | 1 |
| Space | 3 |
| Technology | 20 |
| Textile industry | 8 |
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