The Pandaoling tunnel is the longest non-pressure diversion tunnel of the main channel from Datong river to water irrigation project at Qinwangchuan region.
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 of theDatong River to Qinwangchuan region water transferring irrigation project.
盘道岭隧洞是甘肃引大入秦灌溉工程总干渠上最长的无压引水隧洞。
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