 |
多级柱
| 塞
| 泵
| 多级柱 | |
| tech. | multistage column |
| 塞 | |
| gen. | cork; stopper; stuff; top |
| archit. | cap |
| dril. | plug; cock |
| hydroel.st. | plug |
| 泵 | |
| environ. | pump |
| |||
| multistage column | |||
|
多级柱 : 8 phrases in 5 subjects |
| Chemistry | 1 |
| Metallurgy | 1 |
| Mining | 1 |
| Oil / petroleum | 3 |
| Technology | 2 |
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