máng jǐng
意思解释：（Blind well）暗井。
地下采矿时，用来联系上下水平而无直通地面出口的垂直或倾斜的通道。装有提升设备，供上下人员，运输矿石、材料及通风、排水之用。也称暗井。…
When subterranean mining, use couplet to strung issues a standard and be exported without direct ground perpendicular or tilting passageway. Of hoist, supply fluctuation personnel, carriage ore, material reachs ventilated, drain off water with. Also weigh blind shaft. ...
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