爆力运矿采矿法
Explosive ore-handling mining
排水采气
dewatering gas recovery
drainage gas recovery
dewatering gas production
draining gas recovery
gas production by water drainage
Gas Recovery by Water Drainage
Water Drainage and Gas Recovery
Gas Production by Dewatering
Drainage and Gas Production
water drainage Treatment to polluted water
drainage gas
gas drainage recovery
water-drainage gas production
dewatering gas lift
Removing Liquor Accumulations from Gas wells
problem
Drainage
排水采油
Oil Production with Drainage
water drainage-oil production
泡沫排水采气
foam drainage gas production
foam-dewatering gas recovery technology
浅孔留矿采矿法
short hole shrinkage stoping method
short hole shrinkage mining
Short-hole Shrinkage Method
shallow shrinkage stoping
小油管排水采气法
water drainage and gas recorery using small oll pipe
排水矿坑
natural coal mine drainage pit
城市给水排水工程
municipal water and wastewater engineering