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| 同轴圆柱体 | |||
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coaxial cylinder : 21 phrases in 9 subjects |
| Chemistry | 3 |
| Drilling | 3 |
| Metallurgy | 4 |
| Oil / petroleum | 3 |
| Plastics | 1 |
| Polymers | 1 |
| Shipbuilding | 2 |
| Space | 1 |
| Technology | 3 |
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