boiler barrel water-level
Barrel Valve of Water Turbine
boiler barrel’s water level control
optimized design of water drawing barrel
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