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Ride the train to the ventilation shaft. 乘火車到達通風(fēng)井找到柱狀物體。
I didn't even hear any planes except a couple of westbound commercial airliners that habitually use this air shaft to fly over. 除了幾架照例飛越這座通風(fēng)井的向西飛去的商業(yè)航班之外，我甚至未曾聽到其他飛機的聲音。
The mine flooding happed during construction of the air shaft in Qidong Coal Mine. 祁東煤礦風(fēng)井在建井過程中，發(fā)生鉆井井壁突水事故，井筒被淹。