Pre-feed Water Ball-shaped System
sea(fresh) water ball piston hydraulic pump
water water energetic reactor
Water-Water Gas Engine Driven Heat Pump (WWGEHP)
Water-water Heat Exchanger
ball cage patterned universal joint
BALL-CAGE TYPE CONSTANT VELOCITY JOINT
universal ball-cage joint
automatic scanning water-jetting high-altitude water cannon fire-extinguishing device
balance between water supply and water demand
ballast water and de-ballast water