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| 转向管柱轴管 | |||
| 转向轴管; 柱形管 | |||
| column tube: 20 phrases in 6 subjects |
| Architecture | 1 |
| Automobiles | 2 |
| Bridge construction | 1 |
| Chemistry | 2 |
| Oil / petroleum | 2 |
| Technology | 12 |
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