 |
| |||
| 透通气管 | |||
| 排气管; 放散管 | |||
| 排出管; 放泄管 | |||
| 排放管 | |||
| 通风管; 通气管 | |||
| 气门管; 放气管 | |||
| 通风管透气管 | |||
| 放空管 | |||
| 风管 | |||
| 通气［通风］管 | |||
| 出气管; 透气管 | |||
| |||
| 通风〔排气，透气〕管 | |||
| 通风管 | |||
| 通气管; 排气管 | |||
| vent pipe: 44 phrases in 8 subjects |
| Aviation | 1 |
| Electronics | 2 |
| Hydroelectric power stations | 2 |
| Nautical | 2 |
| Project management | 1 |
| Rail transport | 2 |
| Shipbuilding | 2 |
| Technology | 32 |