单词swallet
n.: 地下水网络: 落水洞；灰岩渗水坑
地下水
The Application of Water Quality Analytical Method in Decision of Swallet Source
水质分析法在判定矿井涌水水源中的应用
Analysis of Mine Swallet Factors in the Baoding Coal Mine, Panzhihua
攀枝花宝鼎煤矿矿井充水因素分析