风机水泵节能
the water pump energy-conservation of the air blower
双向灯泡贯流式水轮水泵机组
double-acting light bulb tubular turbine and water pump set
水泵水轮机全特性
complete characteristic curves of pump turbine
发动机水泵安装
engine water pump mounting
反动水轮机
reaction hydraulic turbine
节能节水
saving water and energy
Energy-saving and water-saving
Energy and Water Saving