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central hidroeléctrica
energ.ind.	centrale idraulica
energ.ind., el.	centrale idroelettrico
environ.	centrale idroelettrica
hydrol.	impianto idroelettrico; stazione idroelettrica
centrales hidroeléctricas
environ., energ.ind.	centrale idroelettrica

central hidroeléctrica: 13 phrases in 3 subjects

Energy industry	10
Environment	2
Mechanic engineering	1