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。

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Satisfying solution is obtained in stability of non pressure tunnel surrounding rocks during the establishing period and the repairing period.

使无压水工隧洞的完建期和检修期的围岩稳定问题得到较为满意的解决。

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The distribution of wind pressure of a mutual inserted multi-greenhouse was researched comprehensively on wind angles and canopy or non-canopy on the basis of wind tunnel test.

该文采用风洞试验方法，在不同风向角与是否安装遮阳幕的情况下对互插式连栋塑料温室的风压分布进行了详细的试验研究。

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