矿井重力供水
gravity water supply in mine well
矿井水水质评价
mine water quality assessment
水井、井水及废水
Wells and well water and waste water
低温矿井水
low temperature mine water
高铁高锰矿井水
mine water with high concentration of iron and manganese
高铁锰矿井水
mine water with high iron and manganese content
孔隙充水矿井
mine with pore water yield
矿井供电
power supply in mining industry
矿井水患
coal mine groundwater hazards
矿井水利用
mine drainage utilization
utilization of mine－ shaft sewage