píng dòng
意思解释：（Gallery）亦称“平窿”。 在山地开采矿床时所挖掘的有直通地面出口的水平通道。供运输矿石、材料、人员及通风、排水之用。
也称平窿。在山地开采矿床时所挖掘的有直通地面出口的水平通道。供运输矿石、材料、人员及通风、排水之用。何永鳌《火焰山上四十天》:“中午，为了继续查明火焰山区赤铁矿的储量，他们在半山腰找到了一个从前老乡挖过煤的…
Also say to make the same score Long. There is the horizontal channel that direct ground exports in what what dig when country mine field. Use for carrying what ore, material, personnel reachs ventilated, drain off water. He Yongao on blaze hill 40 days : Does of of pa form Shu think of of of dredge of ⒘ of Mu of Shan of of Tong of of horn of Zhe of dice of Shuo of silk ribbon aing concubine of an emperor to steal mix of job of of Qu Qian cellar copy of drought of of Quan of Bin of shipboard of coat of post Ju care
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