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ROZDRUZOVANI NEPREDTRIDENEHO UHLI V SAZECKACH = CLEANING NON PRECLASSIFIED COALS IN JIGS = EPURATION DE CHARBONS NON CLASSES PREALABLEMENT DANS DES BACS A PISTONNAGEKLEGA V; SAFFA F.1980; UHLI; CSK; DA. 1980; VOL. 28; NO 5; PP. 204-206; ABS. RUS/ENG/GER; BIBL. 7 REF.Article
