矿井重力供水
gravity water supply in mine well
煤—水双资源矿井
Coal-water double-resources mine
供水输水系统
water supply and transporting system
供水施救
rescue system of water supply
供水水平
amount of water - applied
irrigation rate
供水水源
source of water supply
urban water supply source
water supply source
raw water for potable water supply