爆力运矿采矿法
Explosive ore-handling mining
排水采气
Drainage and Gas Production
water-drainage gas production
Gas Recovery by Water Drainage
Water Drainage and Gas Recovery
gas drainage recovery
Removing Liquor Accumulations from Gas wells
dewatering gas production
dewatering gas recovery
water drainage Treatment to polluted water
dewatering gas lift
drainage gas recovery
Gas Production by Dewatering
problem
drainage gas
gas production by water drainage
Drainage
draining gas recovery
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
shallow shrinkage stoping
short hole shrinkage stoping method
short hole shrinkage mining
Short-hole Shrinkage Method
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