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同轴 圆 : 30 phrases in 11 subjects |
| Chemistry | 3 |
| Drilling | 2 |
| Figure skating | 1 |
| General | 1 |
| Metallurgy | 6 |
| Oil / petroleum | 3 |
| Plastics | 1 |
| Polymers | 6 |
| Shipbuilding | 2 |
| Space | 1 |
| Technology | 4 |
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