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a brownish-black coal that is intermediate in coalification between peat and subbituminous coal, taimset päritolu põlev maavara, pruunsöe liik
brown coal . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/brown%20coal/1/eng (20.06.2026)