低水头滴灌
low-water head drip irrigation
滴滴滴
dichlorodiphenyldichloroethane
DDD
滴式水银电极
dropping mercury electrode
节约用水滴滴计较
Saving Every Drop of Water
水滴形扰流柱
water drop-shaped pin fins
water drop-shaped column
超低水头水轮机
ultra low-head hydraulic turbine
低水头水电厂
low head water power plant
low head hydroelectric power station