free-flow tunnel
| development
| free flow tunnel | |
| hydrol. | 明渠 |
| tech. | 明流隧洞; 无压隧洞; 无压隧道 |
| free-flow tunnel | |
| hydroel.st. | 明流隧洞 |
| development | |
| met. | 研制; 改进; 发达; 扩展; 产生; 显像 |
| |||
| 明渠 | |||
| 明流隧洞; 无压隧洞; 无压隧道 | |||
| |||
| ★ 无压隧洞; 明流隧洞 | |||
|
free-flow tunnel : 7 phrases in 2 subjects |
| Hydroelectric power stations | 3 |
| Technology | 4 |