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central well
| down take
| central well | |
| met. | 中心进料孔; 缓冲圆筒 |
| down take | |
| archit. | 下降管; 下导气管 |
| down-take | |
| cast.iron. | 下降管 |
| met. | 下气道; 降气管 |
| |||
| 中心进料孔; 缓冲圆筒 | |||
| central well: 5 phrases in 4 subjects |
| Chemistry | 1 |
| Engineering geology | 1 |
| Oil / petroleum | 1 |
| Technology | 2 |
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