Ride the train to the ventilation shaft. 乘火车到达通风井找到柱状物体。
I didn't even hear any planes except a couple of westbound commercial airliners that habitually use this air shaft to fly over. 除了几架照例飞越这座通风井的向西飞去的商业航班之外，我甚至未曾听到其他飞机的声音。
The mine flooding happed during construction of the air shaft in Qidong Coal Mine. 祁东煤矿风井在建井过程中，发生钻井井壁突水事故，井筒被淹。
