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梯级水电站
el.	series of power stations
el.mach.	stage hydro station
hydroel.st.	cascade hydropower station; step hydroelectric station; cascade hydroelectric stations; cascade hydropower stations
tech.	cascade hydroelectric power plant; cascade hydroelectrical power plant; cascade hydroelectric station; cascade hydroelectrical station; power station in cascade; step hydroelectrical station

梯级水电站: 2 phrases in 1 subject

Electronics

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