downcomer
| backup
| downcomer | |
| cast.iron. од. | 下降管 |
| met. | 下气道; 降气管 |
| oil | 落水管; 下导管; 下流管; 下水管 |
| oil од. | 降液管 |
| swim. | 下水道; 下水道 |
| backup | |
| bowl. | 歪球 |
| met. | 备用设备; 备用的; 辅助的 |
| multimed. | 后援 |
| oil | 咬定 |
| space | 备份的; 支援; 后备 |
| weld. | 焊接垫板 |
| |||
| 泄水〔下水，落水，降液，下降，排气,〕管 | |||
| 泄水下水，下导，排气管; 下气烟道 | |||
| ★ 下降管 | |||
| 下气 〔烟〕道; 水落管 | |||
| 锅炉循环水管 | |||
| 下气道; 降气管 | |||
| ★ 降液管; 落水管; 下导管; 下流管; 下水管 | |||
| 游泳池的下水道; 游泳池下水道 | |||
| 泄水管; 下气烟道; 排气管; 废水管; 降水管; 下降管; 高炉下气道; 排液管; 锅炉循环水管 | |||
|
downcomer : 55 phrases in 12 subjects |
| Architecture | 1 |
| Cast iron | 1 |
| Chemistry | 7 |
| Company name | 1 |
| Electricity | 1 |
| Electronics | 14 |
| General | 6 |
| Metallurgy | 7 |
| Oil / petroleum | 8 |
| Oil processing plants | 1 |
| Refrigeration | 1 |
| Technology | 7 |