piston ventilation shaft layout活塞风井设置
ventilation of mine shaft矿井通风
south ventilation shaft南风井
surface mine ventilation shaft地面风井
uranium mine ventilation shaft铀矿井通风
emergency ventilation shaft事故通风井
a ventilation shaft排气孔
tunnel l ventilation shaft隧道通风井
ventilation shaft reconstructing风井改造
At present, the number of highway tunnel ventilation shaft construction are very few, and the experience of designs and construction is not yet mature.
目前国内修建的公路隧道通风竖井数量不多,在设计和施工上还没有成熟的经验。
参考来源 - 地铁风亭和风井形式对隧道通风效果影响的研究