carry fire in one hand and water in the other
water water energetic reactor
Water-Water Gas Engine Driven Heat Pump (WWGEHP)
Water-water Heat Exchanger
automatic scanning water-jetting high-altitude water cannon fire-extinguishing device
balance between water supply and water demand
ballast water and de-ballast water
brackish water and semi-saline water
brackish water to salt water
chilled water or hot water storage
circulating water and service water
conjunctive use surface water and ground water