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обогащение руд stresses
chem.	lavage de minerais; traitement des minerais; valorisation des minerais
met.	concentration des minerais; enrichissement des minerais
tech.	préparation des minerais
обогащение руды
chem.	raffinage du minerai
geol.	concentration de minerai
mining.	lavage du minerai; traitement du minerai

обогащение руд: 17 phrases in 5 subjects

Chemistry	1
Geology	2
Metallurgy	5
Mining	7
Technology	2