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针对吕梁山隧道3#斜井及正洞的特点,采取分阶段通风的方法,取得良好的通风效果,以保证工程的顺利进行。
According to the characteristics of 3 # inclined shaft and Zhengdong tunnel in Luliangshan Tunnel, a phased ventilation method is adopted to obtain good ventilation effect so as to ensure the smooth progress of the project.