无压隧洞 non-pressure tunnel
- 无压隧洞多采用圆拱直墙形断面。
Free-flow tunnel used more round arch straight wall form cross-section. - 盘道岭隧洞是引大入秦灌溉工程总干渠上最长的无压引水隧洞。
The Pandaoling tunnel is the longest non-pressure diversion tunnel of the main channel from Datong river to water irrigation project at Qinwangchuan region. - 长距离无压引水隧洞水气两相流的研究对于引水工程过流能力及运行安全具有重要的理论意义及指导作用。
The study of water-air two-phase flow in long-distance free flow tunnel is of great significance to the conveyance capacity and operation safety of water diversion project.
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