water driven rotating biological contaetor with drum
electric driven changed from fuel driven
balance between water supply and water demand
brackish water and semi-saline water
brackish water to salt water
conjunctive use surface water and ground water
continuous stress-day index of water logging and excessive soil water
Cooling tower water and condensed water
coupling about surface water and ground water
differentiation of salt water from fresh water
diverting river water for water source supplement
Drinking water and mineral water
Drinking water and source water
Drinking water and water source
industrial circulation water cooling water system
magmatic water and paleometeoric water